☆ 4.8 Review

A review of progress in proton ceramic electrochemical cells: material and structural design, coupled with value-added chemical production

ENERGY & ENVIRONMENTAL SCIENCE (2023)

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Article Chemistry, Physical

Oxidation of porous stainless steel supports for metal-supported solid oxide electrolysis cells

Fengyu Shen et al.

Summary: The oxidation behavior of porous P434L ferritic stainless steel used in metalsupported solid oxide electrolysis cells (MS-SOEC) was investigated under oxygen-side and steam-side conditions. The impact of oxygen content on the oxygen side and steam:hydrogen ratio on the steam side was determined at 700 degrees C. The results showed that oxidation is more aggressive in the steam-side atmosphere. Pre-oxidation, catalyst coatings, and CuMn1.8O4 coatings were found to mitigate the rapid oxidation and breakaway oxidation observed in bare stainless steel, although the addition of coatings moderately increased the oxidation rate.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2023)

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Review Chemistry, Physical

A mini review of the recent progress of electrode materials for low-temperature solid oxide fuel cells

Shiming Hu et al.

Summary: This review summarizes recent developments of low-temperature solid oxide fuel cell (LT-SOFC) electrodes, including anode and cathode materials. For anode improvement, internal structure design, fine anode structure, reforming layer addition, and in situ exsolution techniques are introduced. For cathode, perovskite-type materials and their composition optimization are discussed, along with nanostructure assembly and 3D morphology design. Several research directions for future studies are also suggested.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2023)

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Article Chemistry, Multidisciplinary

A New Class of Proton Conductors with Dramatically Enhanced Stability and High Conductivity for Reversible Solid Oxide Cells

Zheyu Luo et al.

Summary: This study reports a new class of hexavalent Mo/W-doped proton-conducting electrolyte, BaMo(W)(0.03)Ce0.71Yb0.26O3-delta, which exhibits excellent durability and high ionic conductivity. This material demonstrates significantly enhanced chemical stability against high concentrations of steam and carbon dioxide, while maintaining similar ionic conductivity. P-ReSOCs based on this material show high peak power densities in the fuel cell mode and can operate stably during steam electrolysis.

SMALL (2023)

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Review Chemistry, Multidisciplinary

Protonic Ceramic Electrochemical Cells for Synthesizing Sustainable Chemicals and Fuels

Fan Liu et al.

Summary: This review article comprehensively summarizes the recent progress in using protonic ceramic electrochemical cells (PCECs) for synthesizing a wide range of chemicals. The factors influencing conversion, selectivity, product yield, and energy efficiencies are discussed, providing new insights for designing electrochemical cells, developing electrode materials, and achieving economically viable chemical synthesis. The primary challenges associated with producing chemicals in PCECs are highlighted, along with approaches to tackle these challenges, focusing on deliberately designing electrode materials to achieve practically valuable product yield and energy efficiency. Finally, perspectives on the future development of PCECs for synthesizing sustainable chemicals are provided.

ADVANCED SCIENCE (2023)

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Article Energy & Fuels

Layer-structured Li1-xNaxNi0.8Co0.15Al0.05O2-δ oxide anode for enhancing ceria electrolyte based solid ceramic fuel cell operating at lower temperatures down to 370 °C

Liwen Huang et al.

Summary: A ceria electrolyte-based solid ceramic fuel cell (SCFC) with a layer-structured Li1-xNaxNi0.8Co0.15Al0.05O2 (LNNCA) anode was developed. The use of LNNCA anode significantly improved the power density of the fuel cell at high temperatures, while still maintaining operability at low temperatures. The anchoring effect of doped Na+ and the in-situ grown NaOH played crucial roles in enhancing the catalytic activity, electrical contact, and bonding between the anode and electrolyte, as well as providing transport channels for ions.

APPLIED ENERGY (2023)

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Article Electrochemistry

Oxygen electrodes for protonic ceramic cells

Qingjie Wang et al.

Summary: Protonic ceramic cells (PCCs), including protonic ceramic fuel cells (PCFCs) and electrolysis cells (PCECs), have advantages such as low activation energy for proton diffusion, fuel flexibility, absence of fuel dilution, and potentially lower costs. However, the design of efficient oxygen electrodes is a major challenge for PCCs. Research groups have made efforts to improve the oxygen electrode, resulting in enhanced power output and current density in PCCs. This review article summarizes the progress in oxygen electrodes for PCCs and provides potential pathways for further development of high-performance electrodes.

ELECTROCHIMICA ACTA (2023)

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Article Thermodynamics

Inkjet printing of perovskite ceramics for high-performance proton ceramic fuel cells

Wanhyuk Chang et al.

Summary: In this study, we successfully fabricated perovskite materials for anode-supported proton ceramic fuel cells (PCFCs) using an inexpensive commercial thermal inkjet printer. The ceramic ink source was synthesized by dissolving PBSCF nanopowder as a pigment in ethanol and propylene glycol methyl ether-based solvents. By optimizing the cathode microstructure through grayscale control, we achieved high performance and stability in low-temperature regions, with a peak power density of 728 mWcm(-2) at 600 degrees C and maintained performance without significant degradation for 80 hours at 500 degrees C. This study proposes an efficient method for fabricating high-quality and precise PBSCF cathodes in PCFCs using inkjet printing.

ENERGY (2023)

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Article Energy & Fuels

Enhanced ORR Activity of A-Site-Deficient SrCo0.8Nb0.1Ti0.1O3-? as a Bifunctional Air Electrode for Low-Temperature Solid Oxide Fuel Cells

Qi Zhang et al.

Summary: In this work, an A-site-deficient perovskite Sr0.95Co0.8Nb0.1Ti0.1O3-o (S0.95CNT) has been developed as a bifunctional air electrode for both oxygen-ion-conducting SOFCs (O-SOFCs) and proton-conducting SOFCs (H-SOFCs). The S0.95CNT air electrode delivers excellent area specific resistances (ASRs) and remarkable peak power densities (PPDs) at intermediate and low temperatures, providing a simple and effective way to improve the oxygen reduction reaction kinetics for ILT-SOFCs.

ENERGY & FUELS (2023)

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Review Chemistry, Physical

Applications of electrospun nanofibers in solid oxide fuel cells - A review

Zhaoxiu Liu et al.

Summary: Electrospinning is the commonly used and promising method for producing nanofibers with small diameter, high specific surface area, and high porosity. In recent years, these nanofiber electrodes have been applied in solid oxide fuel cells (SOFCs), leading to significantly improved electrochemical performance due to their unique microstructure and electron and ion conduction properties. This paper provides a review of the research progress of electrospinning technology in the field of SOFCs, summarizing the effects of various processing parameters on fiber structure and introducing recent electrode preparations using electrospinning method.

JOURNAL OF ALLOYS AND COMPOUNDS (2023)

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Article Materials Science, Ceramics

Large-area anode-supported protonic ceramic fuel cells combining with multilayer-tape casting and hot-pressing lamination technology

Zuzhi Huang et al.

Summary: In this study, large-area PCFCs were successfully fabricated using multilayer-tape casting and hot-pressing lamination technology. Through optimizing the sintering process, PCFCs with dense electrolyte were obtained, showing good performance and durability.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2023)

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Article Materials Science, Ceramics

Microstructure optimization of fuel electrodes for high-efficiency reversible proton ceramic cells

Susu Bi et al.

Summary: The pore structure of fuel electrodes plays a critical role in the electrochemical performance of R-PCCs. By modulating the pore structure, particularly in EC operations, exceptional performance can be achieved.

JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2023)

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Article Materials Science, Ceramics

A high-performance fuel electrode-supported tubular protonic ceramic electrochemical cell

Mingyang Hou et al.

Summary: In this study, tubular protonic ceramic electrochemical cells (PCECs) supported by fuel electrodes were successfully fabricated via a facile and well-controlled phase inversion method combined with a dip-coating process. These cells exhibited excellent peak power densities and electrolysis current densities, and showed stable performance in both fuel cell and electrolysis cell mode.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2023)

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Article Materials Science, Multidisciplinary

A reversible perovskite air electrode for active and durable oxygen reduction and evolution reactions via the A-site entropy engineering

Fan He et al.

Summary: The electrochemical activity and durability of an air electrode with Pr0.2Ba0.2Sr0.2La0.2Ca0.2CoO3-d (PBSLCC) is boosted through A-site entropy engineering. PBSLCC electrode demonstrates enhanced oxygen reaction activity and excellent durability compared to binary and ternary double perovskites. The high-entropy perovskite PBSLCC offers a rational design for air electrodes in reversible solid oxide electrochemical cells (R-SOECs) with high activity and durability.

MATERIALS TODAY (2023)

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Article Chemistry, Applied

Simultaneous generation of electricity, ethylene and decomposition of nitrous oxide via protonic ceramic fuel cell membrane reactor

Song Lei et al.

Summary: This study incorporates nonoxidative dehydrogenation of ethane (NDE) into a protonic ceramic fuel cell membrane reactor to co-generate electricity and ethylene. The reactor shows high ethane conversion (44.9%) and ethylene selectivity (92.7%), with a maximum power density of 200 mW cm-2 at 750 degrees C. Additionally, nitrous oxide decomposition was coupled in the reactor, achieving simultaneous generation of electricity, ethylene, and nitrous oxide decomposition.

JOURNAL OF ENERGY CHEMISTRY (2023)

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Review Materials Science, Multidisciplinary

In situ/operando regulation of the reaction activities on hetero-structured electrodes for solid oxide cells

Tong Hu et al.

Summary: Solid oxide cells (SOCs) have gained widespread attention for their high efficiency in converting various fuels to electricity, renewable electricity to green hydrogen or value-added commodities, and tri-generation of power, heat, and hydrogen. Enhancing the electrocatalytic activity of electrodes through in situ/operando regulation of reaction processes on hetero-structured electrodes has been proven effective in improving the performance and durability of SOCs. The unique compositions, structures, and microscopic features of the heterostructures play a critical role in enhancing the electrocatalytic activity and durability of the electrodes.

PROGRESS IN MATERIALS SCIENCE (2023)

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Article Chemistry, Multidisciplinary

High-Performance Ammonia Protonic Ceramic Fuel Cells Using a Pd Inter-Catalyst

Heon Jun Jeong et al.

Summary: This study presents the performance and durability of protonic ceramic fuel cells (PCFCs) in an ammonia fuel injection environment. The use of a palladium (Pd) catalyst improves the low ammonia decomposition rate in PCFCs with lower operating temperatures. By treating the anode with Pd catalyst, the performance of PCFCs is significantly enhanced, with a peak power density of 340 mW cm (-2) at 500 degrees C. The Pd catalysts are deposited through an atomic layer deposition post-treatment process, improving current collection and reducing polarization resistance in the low-temperature region.

SMALL (2023)

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Article Nanoscience & Nanotechnology

Novel n-i CeO2/a-Al2O3 Heterostructure Electrolyte Derived from the Insulator a-Al2O3 for Fuel Cells

Yingbo Zhang et al.

Summary: A novel n-i heterostructure strategy using CeO2 and amorphous alumina has been proposed to develop composite electrolytes for low-temperature solid oxide fuel cells (LT-SOFCs). The CeO2/a-Al2O3 electrolyte exhibits high ionic conductivity and fuel cell performance due to the suppressing effect on electron conduction and the promotion of ion transport caused by the potential energy barrier and thermoelectric effect at the heterointerface. This study presents a practical electrolyte design and opens frontiers in developing high-efficiency electrolytes for LT-SOFCs using insulating materials.

ACS APPLIED MATERIALS & INTERFACES (2023)

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Article Chemistry, Multidisciplinary

An Efficient High-Entropy Perovskite-Type Air Electrode for Reversible Oxygen Reduction and Water Splitting in Protonic Ceramic Cells

Fan He et al.

Summary: A highly active and durable air electrode, high-entropy Pr0.2Ba0.2Sr0.2La0.2Ca0.2CoO3-delta (HE-PBSLCC), is designed for efficient oxygen reduction and water splitting. When used in reversible protonic ceramic electrochemical cells (R-PCECs), the HE-PBSLCC achieves impressive performance in fuel cell (FC) mode with a maximum power density of 1.51 W cm(-2) and in electrolysis cell (EC) mode with a current density of -2.68 A cm(-2) at 1.3 V. The cells also show good operational and cycling durabilities.

ADVANCED MATERIALS (2023)

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Review Chemistry, Physical

High-Entropy Perovskites for Energy Conversion and Storage: Design, Synthesis, and Potential Applications

Yuhao Wang et al.

Summary: Perovskites have shown great potential in energy conversion and storage technologies. High-entropy perovskites (HEPs) have emerged as a new type of perovskite framework due to their excellent stability and performance. This work reviews the recent progress in HEPs, including synthesis methods and applications, and explores effective strategies for their design through atomistic computations. The outlook of this field provides guidance for the development of new and improved HEPs.

SMALL METHODS (2023)

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Article Engineering, Environmental

High-entropy oxides for catalysis: A diamond in the rough

Yingtong Pan et al.

Summary: The notion of entropy engineering has revitalized the research and development of sophisticated functional materials. High-entropy materials, particularly high-entropy alloys, have gained significant attention in environmental science and renewable energy technology. However, systematic research on high-entropy ceramics is still lacking. Recent studies suggest that high-entropy oxides, belonging to high-entropy ceramics, show potential as next-generation catalysts. This review provides an overview of the concept, synthesis methods, and catalytic performance of high-entropy oxides, highlighting their advantages as functional catalytic materials.

CHEMICAL ENGINEERING JOURNAL (2023)

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Article Chemistry, Multidisciplinary

In Situ Engineering of a Cobalt-free Perovskite Air Electrode Enabling Efficient Reversible Oxygen Reduction/evolution Reactions

Tong Hu et al.

Summary: A cobalt-free perovskite material has been developed for improving the stability and performance of reversible protonic ceramic electrochemical cells (R-PCECs).

ADVANCED FUNCTIONAL MATERIALS (2023)

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Article Engineering, Environmental

BaCo0.4Fe0.4Nb0.1Sc0.1O3-delta perovskite oxide with super hydration capacity for a high-activity proton ceramic electrolytic cell oxygen electrode

Chengyi Lu et al.

Summary: This article reports on the development of a Nb5+ and Sc3+ co-doped BaCo0.4-Fe0.4Nb0.1Sc0.1O3-delta (BCFNS) perovskite oxygen electrode, which exhibits strong hydration capability and proton mobility. The co-doping of Nb5+ and Sc3+ significantly improves the electrolytic performance of PCECs, leading to higher current densities.

CHEMICAL ENGINEERING JOURNAL (2023)

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Article Chemistry, Physical

3D Printing Enabled Highly Scalable Tubular Protonic Ceramic Fuel Cells

Minda Zou et al.

Summary: This study presents a cost-effective 3D printing technique for manufacturing large-area tubular PCFCs, allowing for low-cost material preparation and achieving exemplary shape/dimension-controlled uniform microstructures. The 3D-printed tubular PCFC exhibits a high power output and long-term stability, indicating its potential for realistic applications and scale-up.

ACS ENERGY LETTERS (2023)

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Article Energy & Fuels

Lowering the operating temperature of protonic ceramic electrochemical cells to & lt;450?degrees C

Fan Liu et al.

Summary: A simple and scalable approach for fabricating ultrathin and robust proton-conducting electrolytes is reported. The composites formed in situ significantly reduce the resistances and enable high power densities and current densities in fuel-cell mode and steam electrolysis mode, respectively.

NATURE ENERGY (2023)

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Review Engineering, Multidisciplinary

Proton Conduction in Perovskite Solid Electrolyte for Proton Ceramic Fuel Cell Application at Intermediate Temperatures: A Short Review

Nur Syafkeena Mohd Affandi et al.

Summary: Proton-conducting ceramics based on perovskite-type oxides have been widely used in fuel cells, hydrogen sensors, and steam electrolysers. This review discusses the mechanism of hydrogen ion movement in proton-conducting solid oxide fuel cells, including experimental and modelling data. It provides a brief understanding of the connection between experimental and modelling evidence for proton mechanisms in perovskite electrolyte materials.

JURNAL KEJURUTERAAN (2023)

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Article Chemistry, Multidisciplinary

Visiting the roles of Sr- or Ca- doping on the oxygen reduction reaction activity and stability of a perovskite cathode for proton conducting solid oxide fuel cells

Tong Hu et al.

Summary: The effect of A-site doping on the oxygen reduction reaction activity and stability in perovskite cathodes is studied by evaluating symmetrical and single cells. Ca-doped PBC (PBCC) exhibits slightly smaller polarization resistance and lower degradation rate compared to Sr-doped PBC (PBSC) in wet air. Additionally, single cells with PBCC cathode show higher peak power density and better durability than those with PBSC cathode, possibly due to a fast and stable surface oxygen exchange process.

SUSMAT (2023)

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Article Chemistry, Multidisciplinary

An Efficient Steam-Induced Heterostructured Air Electrode for Protonic Ceramic Electrochemical Cells

Kang Xu et al.

Summary: This article reports the recent findings in the performance enhancement of reversible protonic ceramic electrochemical cells (R-PCECs) using a novel heterostructured air electrode. The heterostructured electrode, induced by the interaction of the electrode and steam, shows a faster surface exchange process and enhances the catalytic activity and durability of the air electrode.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Chemistry, Multidisciplinary

A New Durable Surface Nanoparticles-Modified Perovskite Cathode for Protonic Ceramic Fuel Cells from Selective Cation Exsolution under Oxidizing Atmosphere

Mingzhuang Liang et al.

Summary: A durable perovskite-based nanocomposite cathode for PCFCs is successfully prepared through manipulation of precursor composition and cation nonstoichiometry, exhibiting superior cathodic performance with a maximum peak power density of 1040 mW cm(-2) at 650 degrees C and excellent operational stability of 400 h at 550 degrees C.

ADVANCED MATERIALS (2022)

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Article Materials Science, Ceramics

Ba-deficiency in BaCoO3 cathode allows high performance for proton-conducting solid oxide fuel cells

Keyou Shi et al.

Summary: A slight deficiency of Ba in BaCoO3 improves its chemical stability, protonation, and surface catalytic activity, resulting in enhanced fuel cell performance.

CERAMICS INTERNATIONAL (2022)

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Article Chemistry, Multidisciplinary

An efficient and durable anode for ammonia protonic ceramic fuel cells

Hua Zhang et al.

Summary: Ammonia protonic ceramic fuel cells (PCFCs) have the potential to be a highly efficient power source with high energy density, but the catalytic activity of existing anodes for ammonia utilization is inadequate. This study presents an Fe-modified Ni/BZCYYb anode with enhanced activity and durability, providing valuable guidance for the development of efficient electro-catalysts for ammonia PCFCs.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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Article Chemistry, Multidisciplinary

Water as a hole-predatory instrument to create metal nanoparticles on triple-conducting oxides

Jun Hyuk Kim et al.

Summary: A novel methodology for achieving transition metal nanocatalysts well dispersed on triple-conducting oxide surfaces has been presented, with the generation of Ag nanoparticles through water vapor resulting in significantly improved electrode performance in a fuel cell. The observations suggest a new design direction for oxide-supported catalysts with multiple charge carriers.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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Article Energy & Fuels

Electrochemical Reduction of CO2 with Exsolved Metal-Oxide Interfaces in a Proton-Conducting Solid Oxide Electrolyzer

Xirui Zhang et al.

Summary: This study presents a method of electrochemically reducing carbon dioxide into valuable chemicals and fuels to achieve emission reduction. By engineering the interfaces, the length and composition of the active interfaces are increased to promote CO2 reduction. The experiment shows that the best performance can be achieved with an applied voltage of 0.8 V under the composition of Ni0.5Cu0.5-NTMO.

ENERGY & FUELS (2022)

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Article Energy & Fuels

High-performance protonic ceramic fuel cells with electrode-electrolyte composite cathode functional layers

Sung Jea Yang et al.

Summary: This study demonstrated the enhanced performance of protonic ceramic fuel cells by adopting electrode-electrolyte cathode functional layers (CFLs), resulting in improved power output and reduced electrode polarization resistance. The extended interface between the cathode and electrolyte in the CFLs was found to contribute to the enhancement of electrode performance.

INTERNATIONAL JOURNAL OF ENERGY RESEARCH (2022)

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Article Chemistry, Physical

Effects of cathode thickness and microstructural properties on the performance of protonic ceramic fuel cell (PCFC): A 3D modelling study

Zheng Li et al.

Summary: In this study, a 3D PCFC model focusing on cathode thickness and microstructure design was developed to optimize PCFC performance. Unlike traditional 1D/2D models, this model fully considers the effects of rib size on PCFC performance. The study found that the optimal cathode thickness is about 120-200 mm, and performance improvements can be achieved by adjusting the cathode porosity and particle size.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

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Article Materials Science, Ceramics

Improving electrochemical performance of (Cu, Sm)CeO2 anode with anchored Cu nanoparticles for direct utilization of natural gas in solid oxide fuel cells

Zhicheng Wang et al.

Summary: In this study, a solid oxide fuel cell (SOFC) anode with high resistance to coking and sulfur poisoning was successfully developed. The anode, consisting of (Cu, Sm)CeO2 with anchored Cu nanoparticles, exhibited good conductivity and catalytic activity, resulting in high power density and low ohmic resistance when dry methane was used as fuel. Furthermore, the anode showed stability under low H2S content, demonstrating its potential for natural gas applications.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2022)

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Article Chemistry, Physical

Hydride-ion-conducting K2NiF4-type Ba-Li oxyhydride solid electrolyte

Fumitaka Takeiri et al.

Summary: Hydrogen transport in solids is crucial for sustainable energy societies. Practical hydrogen conductivity at intermediate temperatures remains a challenge. A K2NiF4-type Ba-Li oxyhydride is shown to exhibit temperature-independent hydrogen conductivity, which is important for energy and chemical conversion devices.

NATURE MATERIALS (2022)

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Article Chemistry, Physical

Highly Active and Durable Air Electrodes for Reversible Protonic Ceramic Electrochemical Cells Enabled by an Efficient Bifunctional Catalyst

Yinghua Niu et al.

Summary: The electrocatalytic activity and stability of a conventional air electrode for protonic ceramic electrochemical cells are greatly enhanced by a multiphase catalyst coating, leading to improved performance in high steam concentration environments.

ADVANCED ENERGY MATERIALS (2022)

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Article Chemistry, Physical

Fabrication of multi-layered structures for proton conducting ceramic cells

Wendelin Deibert et al.

Summary: Protonic ceramic fuel cells show high potential for efficient energy production, with multilayer structures used to optimize electrolyte thickness and performance. The study demonstrates the fabrication process of cells using sequential tape-casting, with detailed characterization of starting powders and thermal behavior during heat treatment. The research also reveals the formation of a BaY2NiO5 transient liquid phase during cell heat treatment, showcasing competitive proton conductivity values at 600 degrees C.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Chemistry, Physical

Self-assembled nano-composite perovskites as highly efficient and robust hybrid cathodes for solid oxide fuel cells

Jun Hyuk Kim et al.

Summary: This study presents a superior biphasic nano-composite cathode Ba0.5Sr0.5Co0.6Fe0.2Zr0.1Y0.1O3-delta (BSCFZY), which utilizes the cooperative interaction between Co-rich and Zr-rich perovskite domains to enhance the electrocatalytic activity and microstructural robustness in fuel cells. The multi-phase catalysts prepared via a simple one-pot synthesis not only show promise for SOFCs but also for other energy conversion and storage devices.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Chemistry, Physical

Promotion of the oxygen evolution reaction via the reconstructed active phase of perovskite oxide

Hyoi Jo et al.

Summary: The development of stable and highly efficient electrocatalysts for the oxygen evolution reaction (OER) is crucial for renewable, safe, and emission-free energy technologies. Various strategies have been proposed for highly efficient perovskite catalysts, with controlling the composition of transition metals at the B-site being a dominant parameter. Doping Fe into Co-based perovskite oxides alters the intrinsic properties, resulting in efficient OER activity and prolonged stability.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Chemistry, Physical

Influence of Y-substitution on phase composition and proton uptake of self-generated Ba(Ce,Fe)O3-δ-Ba(Fe,Ce)O3-δ composites

Christian Berger et al.

Summary: Self-generated composites of BaCe1-(x+z)FexYzO3-delta series were synthesized by one-pot method, consisting of proton and electron conducting phases, suitable for electrode materials in protonic ceramic fuel cells and electrolyzers. X-ray diffraction and scanning electron microscopy revealed the presence of Fe-rich phases and Ce-rich perovskite phases, with Y substitution influencing mutual solubility. Additional strategies to enhance proton uptake by substituting ions with different basicity are discussed.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Materials Science, Ceramics

Evaluation of stability and functionality of BaCe1-xInxO3-δ electrolyte in a wider range of indium concentration

Aleksandar Malesevic et al.

Summary: The properties of BaCe1-xInxO3-delta as a proton conducting electrolyte were examined. BaCe0.75In0.25O3-delta showed the highest total conductivity in a wet hydrogen atmosphere. A minimum of 15 mol% In was able to completely suppress electrolyte degradation in a pure CO2 atmosphere. The fuel cell tested in a wet hydrogen atmosphere demonstrated high power density.

JOURNAL OF ADVANCED CERAMICS (2022)

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Review Energy & Fuels

Degradation issues and stabilization strategies of protonic ceramic electrolysis cells for steam electrolysis

Hanrui Su et al.

Summary: Protonic ceramic electrolysis cells (PCECs) show promise for efficient energy conversion, but face significant degradation issues. Strategies to inhibit long-term degradation, such as chemical composition modifications and microstructure tuning, are being explored to enhance their durability.

ENERGY SCIENCE & ENGINEERING (2022)

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Review Chemistry, Multidisciplinary

Advanced Materials for Thin-Film Solid Oxide Fuel Cells: Recent Progress and Challenges in Boosting the Device Performance at Low Temperatures

Jun Zhang et al.

Summary: Solid oxide fuel cells (SOFCs) are efficient electrochemical energy conversion devices that have the potential to become low cost. However, their high operating temperatures have hindered their widespread commercialization. This review summarizes the recent progress in developing materials to lower the operating temperature of SOFCs and discusses the new opportunities and challenges. The focus is on thin film SOFCs, sub-micrometer SOFCs based on microelectromechanical systems, and devices based on proton-conducting oxide electrolyte.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Chemistry, Physical

A high-performance and durable direct NH3 tubular protonic ceramic fuel cell integrated with an internal catalyst layer

Yuxin Pan et al.

Summary: Nickel-based cermet anode-supported protonic ceramic fuel cells (PCFCs) have great potential for direct utilization of ammonia. This study reports embedded tubular PCFCs with a catalytic iron layer, which show improved performance and stability.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Article Chemistry, Physical

High-yield electrochemical upgrading of CO2 into CH4 using large-area protonic ceramic electrolysis cells

Zehua Pan et al.

Summary: Electrochemical production of CH4 from CO2-H2O using protonic ceramic electrolysis cells (PCEC) shows high yield and potential economic benefits and scalability.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Article Engineering, Multidisciplinary

Composite cathodes for protonic ceramic fuel cells: Rationales and materials

Meng Wang et al.

Summary: The article discusses the design principles and materials of protonic ceramic fuel cells and their composite cathodes, exploring the advantages and challenges of operating at low temperatures, with a focus on the importance of high-performance cathode materials.

COMPOSITES PART B-ENGINEERING (2022)

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Article Ecology

Building back better: How big are green spending multipliers?

Nicoletta Batini et al.

Summary: This paper explores the trade-off between spending on the green economy and an economy's strength. The study finds that spending on key carbon-neutral or carbon-sink activities generates more economic activity compared to non-green spending, and the multipliers for green spending are about twice as large as their non-green counterparts, especially when comparing renewable energy investment with fossil fuel energy investment.

ECOLOGICAL ECONOMICS (2022)

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Article Chemistry, Physical

Highly selective reduction of CO2 through a protonic ceramic electrochemical cell

Yakun Wang et al.

Summary: CO2 reduction plays a critical role in achieving carbon neutrality and protonic ceramic electrochemical cell (PCEC) is an efficient strategy for converting CO2 to CO or CH4. In this study, a promising electrochemical performance of CO2 reduction is achieved using a PCEC with optimized air electrode, electrolyte, and fuel electrode. The cells show high selectivity, stability, and efficiency in the production of CO from CO2.

JOURNAL OF POWER SOURCES (2022)

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Article Materials Science, Ceramics

Electrochemical performance and chemical stability of proton-conducting BaZr0.8-xCexY0.2O3-δ electrolytes

Mingyang Zhou et al.

Summary: Protonic ceramic fuel cells (PCFCs) using BaZr0.8-xCexY0.2O3-delta (BZCY) as electrolyte materials were studied for their electrochemical performance and chemical stability. The results showed that increasing Ce4+ content reduced electronic hole conductivity, especially at high temperature. H-2 atmosphere decreased the conductive activation energy of BZCY, while air atmosphere caused electronic leakage. The operation of PCFCs demonstrated that higher Ce4+ content resulted in higher open-circuit voltage and output power density. However, lower Ce4+ content stabilized the materials in CO2 atmosphere.

JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2022)

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Article Multidisciplinary Sciences

Revitalizing interface in protonic ceramic cells by acid etch

Wenjuan Bian et al.

Summary: Researchers improved the electrochemical performance and stability of protonic ceramic fuel cells by acid treatment, enabling exceptional performance at lower temperatures.

NATURE (2022)

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Article Engineering, Chemical

Engineering anion defect in perovskite oxyfluoride cathodes enables proton involved oxygen reduction reaction for protonic ceramic fuel cells

Yin Xu et al.

Summary: This study highlights a novel anion defect engineered perovskite oxyfluoride as a potential cathode material for protonic ceramic fuel cells (PCFCs), demonstrating improved oxygen reduction kinetics and water incorporation kinetics. This material shows high electrocatalytic performance, delivering a higher peak power density compared to traditional cathode materials.

SEPARATION AND PURIFICATION TECHNOLOGY (2022)

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Article Multidisciplinary Sciences

Unraveling the electronegativity-dominated intermediate adsorption on high-entropy alloy electrocatalysts

Jiace Hao et al.

Summary: This study overcomes the limitations of single-element catalysts by designing a high-entropy alloy system, discovering highly active sites with optimized energy barriers, and providing an in-depth understanding of the interactions between intermediates and active sites.

NATURE COMMUNICATIONS (2022)

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Article Multidisciplinary Sciences

Surface restructuring of a perovskite-type air electrode for reversible protonic ceramic electrochemical cells

Kai Pei et al.

Summary: Researchers enhance the performance of reversible protonic ceramic electrochemical cells by water-promoted surface restructuring, improving the electrocatalytic activity for oxygen reduction and evolution while maintaining stability and durability.

NATURE COMMUNICATIONS (2022)

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Article Chemistry, Multidisciplinary

New Undisputed Evidence and Strategy for Enhanced Lattice-Oxygen Participation of Perovskite Electrocatalyst through Cation Deficiency Manipulation

Xiaomin Xu et al.

Summary: Research has shown that utilizing the lattice oxygen-mediated mechanism (LOM) can enhance the oxygen evolution reaction (OER) activity of doped perovskite catalysts. By using a dopant-free cation deficiency manipulation strategy, the diffusion properties of perovskites can be tailored to study the contribution of LOM to OER catalysis.

ADVANCED SCIENCE (2022)

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Article Materials Science, Ceramics

A high-entropy spinel ceramic oxide as the cathode for proton-conducting solid oxide fuel cells

Yangsen Xu et al.

Summary: A high-entropy ceramic oxide is used as the cathode for proton-conducting solid oxide fuel cells for the first time. The high-entropy spinel oxide shows good stability and enhanced performance due to its unique structure. The high-entropy design offers a promising route for the development of high-performance materials for fuel cells.

JOURNAL OF ADVANCED CERAMICS (2022)

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Review Materials Science, Multidisciplinary

Advances in Inkjet-Printed Solid Oxide Fuel Cells

Leila Zouridi et al.

Summary: This review examines the potential and challenges of using inkjet printing (IJP) in the fabrication processes of solid oxide fuel cells (SOFCs). The key aspects of IJP for SOFCs fabrication, including ink formulation, deposition, optimization, and characterization, are described in detail. The effect of inkjet-printed SOFCs on electrochemical performance is highlighted, demonstrating the overall potential of this fabrication technique. Challenges and opportunities for the future development of this topic are also discussed.

ADVANCED MATERIALS TECHNOLOGIES (2022)

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Review Engineering, Multidisciplinary

Policy and Management of Carbon Peaking and Carbon Neutrality: A Literature Review

Yi-Ming Wei et al.

Summary: This study comprehensively collates and investigates 1105 published research studies on carbon peaking and carbon neutrality, and summarizes the priorities and standpoints of key industries. The study also identifies the scientific concerns and strategic demands for achieving these two goals, providing theoretical insights and practical measures for China's carbon-neutral future. This research is crucial for policy formulation related to carbon peaking and carbon neutrality.

ENGINEERING (2022)

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Article Nanoscience & Nanotechnology

Tailoring an Interface Microstructure for High-Performance Reversible Protonic Ceramic Electrochemical Cells via Soft Lithography

Channyung Lee et al.

Summary: This paper reports a novel imprinting-assisted transfer technique for fabricating a micropatterned interlayer structure in a protonic ceramic electrochemical cell, which improves the performance of the cell.

ACS APPLIED MATERIALS & INTERFACES (2022)

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Article Engineering, Multidisciplinary

Y2W3O12@SiO2 composite particles for regulating thermal expansion and interfacial reactions in BaZr0.1Ce0.7Y0.1Yb0.1O3-d/AISI 441 joints

Xiaoyang Wang et al.

Summary: In this study, a novel core-shell structured Y2W3O12@SiO2 composite particle was successfully designed to address the issue of violent interfacial reactions between Y2W3O12 particles and BaZr0.1Ce0.7Y0.1Yb0.1O3-delta electrolyte. The addition of these composite particles significantly reduced the thermal expansion coefficient of the Ag-based sealant and increased the joint strength.

COMPOSITES PART B-ENGINEERING (2022)

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Article Nanoscience & Nanotechnology

High-Entropy Perovskite Oxide: A New Opportunity for Developing Highly Active and Durable Air Electrode for Reversible Protonic Ceramic Electrochemical Cells

Zuoqing Liu et al.

Summary: A novel high-entropy perovskite oxide has been reported as a high-performance air electrode for reversible proton ceramic electrochemical cells, exhibiting exceptional electrochemical performances and durability.

NANO-MICRO LETTERS (2022)

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Article Energy & Fuels

Enhanced low-temperature proton conductivity in hydrogen-intercalated brownmillerite oxide

Nianpeng Lu et al.

Summary: A solid oxide proton conductor, HSrCoO2.5, shows unusually high proton conductivity between 40°C and 140°C, suggesting the potential use of solid oxide materials as proton-conducting electrolytes in low-temperature devices.

NATURE ENERGY (2022)

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Editorial Material Energy & Fuels

Cool proton conductors

Ravindra Singh Bisht et al.

Summary: A hydrogen-intercalated brownmillerite oxide, SrCoO2.5, has been demonstrated to function as a high-performance proton conducting electrolyte below 200 degrees Celsius, providing a new possibility for fuel cells.

NATURE ENERGY (2022)

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Article Chemistry, Physical

A surface reconfiguration of a perovskite air electrode enables an active and durable reversible protonic ceramic electrochemical cell

Fan He et al.

Summary: In this study, a perovskite-type air electrode with naturally formed nanoparticles on the surface was reported to overcome the sluggish kinetics of oxygen reduction and oxygen evolution reactions in reversible protonic ceramic electrochemical cells. The electrode exhibited low polarization resistance and demonstrated excellent electrochemical performance and reversible operational stability at high temperatures.

ENERGY STORAGE MATERIALS (2022)

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Article Multidisciplinary Sciences

Ambitious bill leads to 40% cut in emissions, models show

Erik Stokstad

SCIENCE (2022)

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Article Chemistry, Physical

High-Performance Protonic Ceramic Electrochemical Cells

Dongyeon Kim et al.

Summary: Protonic ceramic electrochemical cells (PCECs) have been attracting attention due to their ability to convert chemical fuels into electricity at low temperatures. However, conventional sintering conditions often result in nonstoichiometric electrolytes and electrode coarsening, leading to performance degradation. In this study, PCECs were fabricated through a microwave-assisted sintering process, which effectively suppressed undesirable diffusion and growth, thus producing PCECs with stoichiometric electrolytes and nanostructured fuel electrodes. The resulting PCECs demonstrated higher electrochemical performance compared to conventionally sintered PCECs, highlighting the effectiveness of the ultrafast sintering technique.

ACS ENERGY LETTERS (2022)

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Article Chemistry, Physical

Highly Conductive and Durable Nb(Ta)-Doped Proton Conductors for Reversible Solid Oxide Cells

Zheyu Luo et al.

Summary: This article reports the rational design of a new series of donor- and acceptor-codoped proton conductors, which exhibit high ionic conductivity and exceptional stability. The findings provide new insights for the development of highly conductive and stable proton conductors for P-ReSOCs.

ACS ENERGY LETTERS (2022)

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Article Nanoscience & Nanotechnology

Development of Electrode-Supported Proton Conducting Solid Oxide Cells and their Evaluation as Electrochemical Hydrogen Pumps

Usman Mushtaq et al.

Summary: A method to overcome fabrication challenges for the development of efficient and robust electrode-supported P-SOCs (protonic ceramic solid oxide cells) was discussed. The study optimized material synthesis and fabrication procedures and evaluated the performance and stability of the cells.

ACS APPLIED MATERIALS & INTERFACES (2022)

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Review Chemistry, Multidisciplinary

Manipulating and Optimizing the Hierarchically Porous Electrode Structures for Rapid Mass Transport in Solid Oxide Cells

Mingyang Hou et al.

Summary: This article reviews the recent research progress in improving the performance of batteries, focusing on the modification of electrode structures. The effects of microstructures on electrode performance and mechanisms are highlighted, along with discussions on the knowledge-based design of highly efficient electrodes.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Chemistry, Multidisciplinary

A Novel Self-Assembled Cobalt-Free Perovskite Composite Cathode with Triple-Conduction for Intermediate Proton-Conducting Solid Oxide Fuel Cells

Hua Tong et al.

Summary: A novel triple-conducting and cobalt-free iron-based perovskite cathode is reported for proton-conducting solid oxide fuel cells (H-SOFCs). By modifying the composition and microstructure, this cathode material exhibits excellent cell performance at 700 degrees C.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Chemistry, Multidisciplinary

Catalytic Self-Assembled Air Electrode for Highly Active and Durable Reversible Protonic Ceramic Electrochemical Cells

Fan He et al.

Summary: A study reports a catalytic self-assembly method to enhance the performance of reversible protonic ceramic electrochemical cells with a highly active and durable air electrode. The electrode performs well at high temperatures and shows excellent performance and durability in experiments, indicating potential for practical applications.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Chemistry, Multidisciplinary

Machine-Learning-Accelerated Development of Efficient Mixed Protonic-Electronic Conducting Oxides as the Air Electrodes for Protonic Ceramic Cells

Ning Wang et al.

Summary: This study accelerates the discovery of efficient mixed protonic-electronic conducting oxides by introducing the machine-learning (ML) method and establishing guidelines for rapid and accurate design and development. The experimental results confirmed the predicted data, showing satisfactory electrochemical performances of the PCC with the selected oxide. This research not only developed a promising air electrode for PCC but also opened a new avenue for ML-based development of mixed protonic-electronic conducting oxides.

ADVANCED MATERIALS (2022)

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Article Chemistry, Physical

Fluorination inductive effect enables rapid bulk proton diffusion in BaCo0.4Fe0.4Zr0.1Y0.1O3-δ perovskite oxide for high-activity protonic ceramic fuel cell cathode

Rongzheng Ren et al.

Summary: This article proposes a strategy of fluorinating a perovskite cathode to promote proton transfer in protonic ceramic fuel cells (PCFCs). Experimental results show that this strategy effectively improves the PCFC output performance.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Article Chemistry, Physical

Nanostructured carbon as highly efficient and stable anodes for ethylene production and power generation in protonic ceramic electrochemical cells

Min Wang et al.

Summary: In this study, aligned carbon nanotube forests (CNTFs) were used as a novel anode material for an ethane fueled PCEC. The CNTF electrode showed superior catalytic and electrochemical performances compared to conventional perovskite-based anodes. The cell also exhibited excellent durability and anti-coking abilities.

CARBON (2022)

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Article Energy & Fuels

Revealing the Impact of Steam Concentration on the Activity and Stability of Double-Perovskite Air Electrodes for Proton-Conducting Electrolysis Cells

Junxian Pan et al.

Summary: In this study, the impact of steam concentration on the activity and stability of a composite air electrode was systematically investigated. The electrode showed reduced electrochemical impedance and improved Faradaic efficiency under high steam concentrations. However, the hydrogen production performance of the cell degraded rapidly when operated under high steam concentrations.

ENERGY & FUELS (2022)

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Review Chemistry, Applied

Ammonia as a green energy carrier: Electrochemical synthesis and direct ammonia fuel cell-a comprehensive review

Bin Wang et al.

Summary: Achieving carbon neutrality by 2050 is an urgent challenge for the world to address climate change. Ammonia, as a promising medium for hydrogen storage, is considered an ideal carbon-free energy carrier. Its critical advantages in long-distance transportation and storage make it a potential solution for hydrogen. This review provides a comprehensive summary of the latest advancements in electrochemical ammonia synthesis and direct ammonia fuel cells, including process mechanisms, material development, and stability issues.

FUEL PROCESSING TECHNOLOGY (2022)

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Article Engineering, Chemical

Rational design of Sr2Fe1.5Mo0.4Y0.1O6-δ oxygen electrode with triple conduction for hydrogen production in protonic ceramic electrolysis cell

Rongzheng Ren et al.

Summary: Protonic ceramic electrolysis cells (PCECs) are a potential technology for efficient electrochemical hydrogen production and purification. However, the poor activity and stability of oxygen electrodes have hindered their large-scale hydrogen production. In this study, a stable phase structure, enhanced hydration capacity, and special triple conduction of the SFMY oxygen electrode were designed and demonstrated. These results suggest that SFMY can be a potential oxygen electrode for PCECs.

SEPARATION AND PURIFICATION TECHNOLOGY (2022)

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Article Engineering, Chemical

Enhanced electrochemical activity and durability of a direct ammonia protonic ceramic fuel cell enabled by an internal catalyst layer

Mingyang Hou et al.

Summary: This study reports a method to enhance the electrochemical activity and durability of ammonia-fueled protonic ceramic fuel cells (PCFCs) by depositing an iron-doped ceria oxide catalyst layer internally. It is demonstrated that an internal layer with a Fe: Ce molar ratio of 6:4 provides the best power output and durability.

SEPARATION AND PURIFICATION TECHNOLOGY (2022)

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Article Chemistry, Multidisciplinary

Electrokinetic Insights into the Triple Ionic and Electronic Conductivity of a Novel Nanocomposite Functional Material for Protonic Ceramic Fuel Cells

Idris Temitope Bello et al.

Summary: Triple ionic and electronic conductivity (TIEC) in cathode materials for protonic ceramic fuel cells (PCFCs) can be achieved by strategic development of multiphase cathode materials. The cubic-rhombohedral TIEC nanocomposite material designed in this study exhibits enhanced oxygen vacancy concentration and proton defects formation and transport, with low enthalpy of protonation and good cell performance stability.

SMALL (2022)

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Article Chemistry, Multidisciplinary

Surface Self-Assembly Protonation Triggering Triple-Conductive Heterostructure with Highly Enhanced Oxygen Reduction for Protonic Ceramic Fuel Cells

Xiaoyu Zhang et al.

Summary: A highly efficient strategy to construct a triple-conductive region through surface self-assembly protonation has been proposed, which improves the electrochemical performance and durability of protonic ceramic fuel cells.

SMALL (2022)

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Article Chemistry, Physical

Building Efficient and Durable Hetero-Interfaces on a Perovskite-Based Electrode for Electrochemical CO2 Reduction

Fan He et al.

Summary: The findings report on a perovskite-based electrode SF1.5MC that enhances the reaction activity and durability for electrochemical oxidation of H-2 and reduction of CO2. Decent performances are demonstrated at 800 degrees C, with high power density and current density achieved.

ADVANCED ENERGY MATERIALS (2022)

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Article Chemistry, Physical

Rationally designed negative electrode for selective CO2-to-CO conversion in protonic ceramic electrochemical cells

Fan Liu et al.

Summary: Protonic ceramic electrochemical cells (PCECs) with a new oxide-supported in-situ exsolved Ni-Fe alloyed nanoparticle electrocatalyst as the negative electrode can selectively convert CO2 to CO. The study proves the effectiveness of the new negative electrode in suppressing the production of CH4.

NANO ENERGY (2022)

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Article Energy & Fuels

A combined ionic Lewis acid descriptor and machine-learning approach to prediction of efficient oxygen reduction electrodes for ceramic fuel cells

Shuo Zhai et al.

Summary: The authors introduce a machine learning-driven approach to accelerate the discovery of efficient oxygen reduction electrodes for ceramic fuel cells by utilizing ionic Lewis acid strength as an effective physical descriptor. Experimental validation confirms the superior activity metrics of four oxides out of 6,871 distinct perovskite compositions, highlighting the importance of ISA in improving oxygen reduction reaction activity in perovskite oxides.

NATURE ENERGY (2022)

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Article Chemistry, Physical

Rational design of perovskite ferrites as high-performance proton-conducting fuel cell cathodes

Zheng Wang et al.

Summary: By substituting A and B sites in BaFeO3-delta to promote the formation of oxygen vacancies and hydroxyl ions while maintaining structural stability, a cobalt-free perovskite with exceptional performance was developed. This rational approach provides a strategy for designing high-activity, low-cost and cobalt-free perovskites.

NATURE CATALYSIS (2022)

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Article Chemistry, Physical

Functionality of the Cathode-Electrolyte Interlayer in Protonic Solid Oxide Fuel Cells

Katsuya Akimoto et al.

Summary: This study found that adding functional layers between the electrolyte and cathode in solid oxide fuel cells can significantly reduce the cathodic reaction resistance. By using a functional layer, the cathode reaction area can be increased and the resistance can be decreased, resulting in higher power densities for the cells.

ACS APPLIED ENERGY MATERIALS (2022)

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Article Chemistry, Physical

Magnesium tuned triple conductivity and bifunctionality of BaCo0.4Fe0.4Zr0.1Y0.1O3-d perovskite towards reversible protonic ceramic electrochemical cells

Mingzhuang Liang et al.

Summary: In this study, a phase-pure perovskite material Ba(Co(0.4)Fe(0.4)Zr(0.1)Y(0.1))0.95Mg(0.05)O(3-δ) (BCFZYM) was developed as an air electrode for R-PCECs by doping a small amount of magnesium (5%). The doping of magnesium effectively enhanced oxygen/steam surface exchange, oxygen-ion and proton conductivity, leading to significantly improved catalytic oxygen reduction and evolution reactions (ORR/OER) activities on protonic electrolytes. R-PCECs with the BCFZYM air electrode displayed excellent performances in fuel cell and electrolysis modes, with favorable stability demonstrated in cycling, electrolysis, and fuel cell modes.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Article Chemistry, Physical

One-pot derived thermodynamically quasi-stable triple conducting nanocomposite as robust bifunctional air electrode for reversible protonic ceramic cells

Zuoqing Liu et al.

Summary: Reversible protonic ceramic cell (RePCC) is an efficient, scalable, and fuel-flexible energy conversion and storage technology. However, finding single-phase triple conducting (H+/O2-/e-) electrodes with high electrochemical activity, structural and thermomechanical stability still faces great challenges. Herein, a thermodynamically stable triple conducting perovskite-perovskite nanocomposite is proposed as a bifunctional RePCC air electrode with exceptional performance, which is synthesized through one-pot method.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Article Materials Science, Multidisciplinary

Nano-LaCoO3 infiltrated BaZr0.8Y0.2O3-& delta; electrodes for steam splitting in protonic ceramic electrolysis cells

Qingjie Wang et al.

Summary: This study addresses the poor performance and insufficient long-term durability of the oxygen electrode in protonic ceramic electrolysis cell (PCEC) technology through the design of a LaCoO3 (LC) catalyst infiltrated porous BaZr0.8Y0.2O3-δ (BZY20) backbone electrode (LC-BZY20). Results show that the LC-BZY20 electrode exhibits good electrochemical performance and stability.

ADVANCED POWDER MATERIALS (2022)

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Article Chemistry, Physical

Tuning the Co/Fe ratio in BaCoxFe0.8-xZr0.1Y0.1O3-δ, a promising triple ionic and electronic conducting oxide, to boost electrolysis and fuel cell performance

Yewon Shin et al.

Summary: The electrochemical performance of BCFZY compositions with varying Co/Fe ratio was evaluated, and it was found that Co-rich compositions exhibited the highest performance and a lower and more linear thermal expansion behavior compared to Fe-rich compositions.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Chemistry, Physical

Remarkably high proton conductivity in cubic perovskite-related Ba3WO6

Jian Yang et al.

Summary: The Ba3WO6 material has multiple polymorphs, and a new polymorph (α-Ba3WO6) with a simple perovskite structure has been discovered in this study. The crystal structure of α-Ba3WO6 has been determined, and it exhibits high proton conductivity. The findings have significant implications for the development of electrolyte materials in proton conducting fuel cells.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Chemistry, Physical

Design of anode functional layers for protonic solid oxide electrolysis cells

Chunmei Tang et al.

Summary: The research demonstrates that using BLFZ as an anode functional layer can significantly improve the electrolysis efficiency of P-SOECs, reduce ohmic and polarization resistances, promote anodic reactions, and thus increase the electrolysis current.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Chemistry, Multidisciplinary

Critical role of acceptor dopants in designing highly stable and compatible proton-conducting electrolytes for reversible solid oxide cells

Zheyu Luo et al.

Summary: Proton-conducting electrolytes have high ionic conductivity at intermediate temperatures and are receiving increasing attention. The effect of B-site dopants on the properties of doped barium hafnate-cerate electrolyte materials has not been systematically studied. The results show that electrical conductivity, ionic transference number, chemical stability, and compatibility with NiO are closely correlated with the dopant size.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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Review Chemistry, Multidisciplinary

Perovskites for protonic ceramic fuel cells: a review

Jiafeng Cao et al.

Summary: Protonic ceramic fuel cells (PCFCs) are a promising energy technology that can efficiently convert chemical energy into electric power at reduced temperature. The practical use of PCFCs relies on efficient key cell materials, such as electrolyte and electrodes, that meet various requirements. In the past two decades, researchers have extensively explored complex oxides with the ABO(3) perovskite or related structure as key materials in PCFCs due to their flexible composition and versatile properties. The material engineering of perovskite oxides for PCFCs is an important focus of research, with a particular emphasis on compositional engineering to modify the lattice structure, defect structure, and ionic transportation behavior of perovskite oxides.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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Article Chemistry, Physical

Selecting the best dopant sites in proton-conducting pyrochlore oxides (La2(Nb1-xYx)2O7-δ) by probing hydration-induced local distortion

Donglin Han et al.

Summary: In this study, the changes in the local structure of proton-conducting pyrochlore oxides upon hydration were investigated using EXAFS analysis. It was found that doping proper sites can significantly increase proton conductivity in oxides.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Chemistry, Physical

Fluorination inductive effect enables rapid bulk proton diffusion in BaCo0.4Fe0.4Zr0.1Y0.1O3-d perovskite oxide for high-activity protonic ceramic fuel cell cathode

Rongzheng Ren et al.

Summary: The study proposes a strategy of fluorinating a perovskite cathode to promote proton transfer and improve the output performance of PCFCs. Experimental results show reduced polarization resistance and enhanced PCFC output performance in the fluorinated BCFZY perovskite.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Article Chemistry, Multidisciplinary

Ammonia-fed reversible protonic ceramic fuel cells with Ru-based catalyst

Liangzhu Zhu et al.

Summary: The study demonstrates the potential of using ammonia as a fuel and energy storage medium, achieving high power generation with RePCFCs featuring ultra-dense and thin protonic ceramic electrolyte layers. Stable operation for up to 1250 hours under ammonia fuel has been reported, with high ammonia production rates in both electrolysis and recycling gas modes.

COMMUNICATIONS CHEMISTRY (2021)

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Article Chemistry, Physical

Fabrication of an electrolyte-supported protonic ceramic fuel cell with nano-sized powders of Ni-composite anode

Sung Hyun Hwang et al.

Summary: By optimizing material composition and fabrication process, a composite anode with good performance was successfully fabricated, leading to a high power density at high temperatures.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

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Review Thermodynamics

Ammonia as an effective hydrogen carrier and a clean fuel for solid oxide fuel cells

Zhijian Wan et al.

Summary: Ammonia is increasingly recognized as a clean fuel due to its zero-carbon characteristics and high hydrogen content. Research has shown that Ni-based catalysts are considered more cost-effective and sustainable alternatives to Ru-based catalysts for ammonia decomposition. Additionally, feeding SOFCs with pre-decomposed ammonia has been identified as a promising method to mitigate anode degradation and improve cell stability.

ENERGY CONVERSION AND MANAGEMENT (2021)

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Article Chemistry, Physical

Hydrogen in energy transition: A review

Ankica Kovac et al.

Summary: The main step towards creating a carbon-neutral society is the implementation of renewable energy sources to replace fossil fuels; while hydrogen technology is recognized as the most promising choice, its large-scale implementation is still in progress. In the coming decades, we can expect the utilization of hydrogen's vast ecological potential.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

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Article Chemistry, Physical

Proton-conducting ceramic fuel cells: Scale up and stack integration

Long Q. Le et al.

Summary: This study demonstrates the scaling up of proton-conducting ceramic fuel cells (PCFCs) into small, multi-cell stacks with reasonable performance and low degradation through material tuning, fabrication procedures, and operating condition adjustments. Specific materials such as the BCZYYb electrolyte and the BCFZY cathode, as well as packaging with ferritic-steel interconnects and macor frames, contribute to the long-term durability and performance of the fuel cell stacks.

JOURNAL OF POWER SOURCES (2021)

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Article Chemistry, Physical

High-performance protonic ceramic fuel cells with a PrBa0.5Sr0.5Co1.5Fe0.5O5+δ d cathode with palladium-rich interface coating

Jong Seon Park et al.

Summary: This study demonstrates the enhanced performance of protonic ceramic fuel cells (PCFCs) by adding palladium (Pd) interlayers, which successfully integrated between the BZCYYb and PBSCF layers with great long-term stability. The presence of Pd significantly improved current collection and reduced polarization impedance at the cathode-electrolyte interface, especially at low temperatures, promising for high-performance and robust PCFCs.

JOURNAL OF POWER SOURCES (2021)

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Review Energy & Fuels

Performance Benchmark of Planar Solid Oxide Cells Based on Material Development and Designs

David Udomsilp et al.

Summary: Solid oxide cell (SOC) technology is rapidly developing and will play an important role in carbon-neutral power supply, with advantages in decentralized power generation and distribution.

ENERGY TECHNOLOGY (2021)

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Article Chemistry, Physical

La0.8Sr0.2Co1-xNixO3-δ as the Efficient Triple Conductor Air Electrode for Protonic Ceramic Cells

Ning Wang et al.

Summary: This study demonstrates that using single perovskite-type La0.8Sr0.2Co1-xNixO3-δ oxides as air electrodes can lead to promising performance in protonic ceramic cells operating at intermediate temperatures, around 600 degrees Celsius. The oxides exhibit efficient H+/e(-)/O2- triple conducting capabilities and have the potential to reduce polarization resistance compared to cells with single or double perovskite-type triple conductors.

ACS APPLIED ENERGY MATERIALS (2021)

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Article Chemistry, Physical

An improved oxygen reduction reaction activity and CO2-tolerance of La0.6Sr0.4Co0.2Fe0.8O3-δ achieved by a surface modification with barium cobaltite coatings

Kai Pei et al.

Summary: The study found that coating the LSCF cathode with a BCO thin film layer can significantly enhance the activity and CO2 tolerance of solid oxide fuel cells. Experimental results demonstrate that under certain conditions, cathodes with BCO coatings outperform those without coatings in terms of performance.

JOURNAL OF POWER SOURCES (2021)

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Article Chemistry, Physical

A Sr and Ni doped Ruddlesden-Popper perovskite oxide La1.6Sr0.4Cu0.6Ni0.4O4+δ as a promising cathode for protonic ceramic fuel cells

Jiyang Ma et al.

Summary: This study presents a Sr and Ni dual doped Ruddlesden-Popper perovskite oxide, La1.6Sr0.4Cu0.6Ni0.4O4+delta (LSCN), with rich oxygen vacancies and good chemical/thermal compatibility with the electrolyte. The LSCN cathode showed promising electrochemical performance with peak power density of 1020 mWcm(-2) and excellent stability at 750 degrees C over a period of 100 hours, making it a potential cathode material for protonic ceramic fuel cells.

JOURNAL OF POWER SOURCES (2021)

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Article Electrochemistry

Protonic Ceramic Fuel Cell with Bi-Layered Structure of BaZr0.1Ce0.7Y0.1Yb0.1O3-δ Functional Interlayer and BaZr0.8Yb0.2O3-δ Electrolyte

Hiroyuki Shimada et al.

Summary: The development of a bi-layered protonic ceramic fuel cell (PCFC) with a functional interlayer has been reported in this paper, showing improved electrochemical performance with higher power density and open-circuit voltage (OCV). The functional interlayer reduces cathode polarization resistance and suppresses current leakage in the PCFC, resulting in enhanced power density and OCV.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2021)

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Review Materials Science, Ceramics

Controlling cation migration and inter-diffusion across cathode/interlayer/ electrolyte interfaces of solid oxide fuel cells: A review

Muhammad Zubair Khan et al.

Summary: Solid oxide fuel cells (SOFCs) are a potential way to achieve efficient and clean electrochemical energy conversion, but commercialization is hindered by material degradation, especially at the cathode-electrolyte interface. Understanding cation migration and interdiffusion is crucial for improving SOFC durability, with perovskite-based oxides showing promising results. Control measures for interdiffusion in the cathode/electrolyte/interlayer are key to designing highly efficient and stable SOFCs.

CERAMICS INTERNATIONAL (2021)

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Article Materials Science, Ceramics

Enhanced La0.6Sr0.4Co0.2Fe0.8O3-δ-based cathode performance by modification of BaZr0.1Ce0.7Y0.1Yb0.1O3-δ electrolyte surface in protonic ceramic fuel cells

Hiroyuki Shimada et al.

Summary: By modifying the cathode/electrolyte interface with a porous BZCYYb interlayer (PBI) in PCFCs, the cathode performance has been significantly improved, achieving high power density at lower temperatures. The use of this interlayer enhances the cathode/electrolyte interfacial structure and increases the triple-phase boundary, resulting in improved overall performance of the fuel cell.

CERAMICS INTERNATIONAL (2021)

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Article Materials Science, Multidisciplinary

SrCe0.9In0.1O3-δ-based reversible symmetrical Protonic Ceramic Cell

Wojciech Skubida et al.

Summary: In this study, In-doped SrCe0.9In0.1O3-delta (SCI) and SrFe0.75Mo0.25O3-delta (SFM) were used as solid electrolyte and composite electrodes to construct symmetrical Protonic Ceramic Fuel Cells (PCFC). The SCI-SFM composite electrodes exhibited good mutual stability at high temperatures, enabling effective electrochemical reactions. The optimal 80:20 wt.% SFM-SCI electrode showed lower polarization resistance and higher power density compared to the 50:50 wt.% ratio, with similar performance in both PCFC and Protonic Ceramic Electrolyzer Cell (PCEC) modes.

MATERIALS RESEARCH BULLETIN (2021)

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Article Multidisciplinary Sciences

Thermal-expansion offset for high-performance fuel cell cathodes

Yuan Zhang et al.

Summary: This study demonstrates an approach to achieving full thermo-mechanical compatibility between the cathode and other cell components for solid oxide fuel cells. By introducing a thermal-expansion offset and using reactive sintering to form a composite electrode, the research shows high activity and excellent stability of the electrode. The introduction of reactive negative-thermal-expansion components may provide a general strategy for developing fully compatible and highly active electrodes for SOFCs.

NATURE (2021)

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Article Green & Sustainable Science & Technology

Improving the performance of Pr0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ-based single-component fuel cell and reversible single-component cells by manufacturing A-site deficiency

Ping Li et al.

Summary: This study explores the application of A-site deficiency perovskite oxides in single-component fuel cells and reversible single-component cells, revealing that Pr0.4Sr0.55Co0.2Fe0.7Nb0.1O3-δ exhibits high catalytic activity for hydrogen oxidation reaction and oxygen reduction reaction.

RENEWABLE ENERGY (2021)

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Article Multidisciplinary Sciences

Improved mechanical strength, proton conductivity and power density in an 'all-protonic' ceramic fuel cell at intermediate temperature

Abul K. Azad et al.

Summary: The addition of Zn to protonic ceramic fuel cells improves their performance, while using the same proton conducting material for structural support offers mechanical advantages and enables high power density and proton conductivity, marking an important advancement towards commercially viable solid oxide fuel cell technology.

SCIENTIFIC REPORTS (2021)

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Article Materials Science, Ceramics

La0.5Sr0.5Fe0.9Mo0.1O3-8-CeO2 anode catalyst for Co-Producing electricity and ethylene from ethane in proton-conducting solid oxide fuel cells

Lijuan Wang et al.

Summary: The LSFM-CeO2 composite as an anode material significantly improves the electrochemical performance of proton-conducting solid oxide fuel cells, showing high activity, stability, and excellent ethylene selectivity and yield.

CERAMICS INTERNATIONAL (2021)

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Article Materials Science, Ceramics

Improvement of Ni-Cermet performance of protonic ceramic fuel cells by catalyst

Soon Ki Kim et al.

Summary: A porous NiO composite anode for protonic ceramic fuel cells was fabricated in this study by adding CuO as a sintering agent and graphite as a pore former. The addition of Pd catalyst to the NiO-composite anode before reducing NiO to Ni improved anode performance in methane fuel and hydrogen fuel by enhancing catalytic activity.

CERAMICS INTERNATIONAL (2021)

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Article Chemistry, Physical

The rare earth dopant (La, Gd, Sm & Y) modulated grain boundary energy barrier suppression in BaZrO3-BaCeO3 solid solution

Aarthi Uthayakumar et al.

Summary: Introducing trivalent rare-earth dopants in barium cerate-zirconate solid solution can modulate grain boundary resistance and enhance protonic conductivity. Doping with smaller ionic radii allows for lower proton trapping sites, achieving higher conductivity.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

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Article Materials Science, Multidisciplinary

Performance of Pr2(Ni,Cu)O4+δ electrodes in protonic ceramic electrochemical cells with unseparated and separated gas spaces

Artem P. Tarutin et al.

Summary: The research focuses on rational engineering of Cu-doped Pr(2)NiO4(+delta) materials and analyzing their electrode behavior for reversible protonic ceramic cells. Results show that copper doping with x = 0.2 has a positive impact on the thermomechanical compatibility of the Ba(Ce,Zr)O-3-based electrolytes.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2021)

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Article Materials Science, Ceramics

PrBaFe2O5+δ promising electrode for redox-stable symmetrical proton-conducting solid oxide fuel cells

Dongyoung Kim et al.

Summary: The study reveals that PBF exhibits proton conductivity at intermediate temperatures and excellent performance and stability in symmetrical PCFCs, making it a promising alternative material.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2021)

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Article Materials Science, Ceramics

Investigation of oxygen ion transport and surface exchange properties of PrBaFe2O5+δ

Seung Jae Son et al.

Summary: The oxygen transport properties and chemical stability of PBF double-perovskite oxide were systematically investigated under CO2-containing or reducing atmospheres. The results show that PBF exhibits high oxygen permeation flux and oxygen ion conductivity, comparable to other oxides with a double-perovskite structure, and superior chemical stability compared to typical oxides like PrBaCo2O5+delta under a CO2-containing atmosphere.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2021)

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Article Chemistry, Physical

Accelerated Proton Transport Based on a p-i-n Heterostructure Membrane for Low-Temperature Solid Oxide Fuel Cells

Zheng Jiang et al.

Summary: The research introduces a p-i-n junction design based on ZnO-Al2O3-NiO, utilizing alumina to enhance cell performance in solid oxide fuel cells.

ACS APPLIED ENERGY MATERIALS (2021)

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Article Chemistry, Physical

A New Pd Doped Proton Conducting Perovskite Oxide with Multiple Functionalities for Efficient and Stable Power Generation from Ammonia at Reduced Temperatures

Fan He et al.

Summary: The use of a new Ba(Zr0.1Ce0.7Y0.1Yb0.1)(0.95)Pd0.05O3-delta perovskite as the key component in ammonia-fueled PCFCs improves catalytic activity for NH3 decomposition and increases proton conductivity, leading to higher power density and stability.

ADVANCED ENERGY MATERIALS (2021)

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Article Chemistry, Physical

Enhancing Electrochemical CO2 Reduction using Ce(Mn,Fe)O2 with La(Sr)Cr(Mn)O3 Cathode for High-Temperature Solid Oxide Electrolysis Cells

Seokhee Lee et al.

Summary: The study developed a dual-phase composite electrode to enhance the electrocatalytic activity of CO2 reduction in high-temperature solid oxide electrolysis cells. The newly developed electrode showed excellent electrolysis performance without using any precious metal catalysts.

ADVANCED ENERGY MATERIALS (2021)

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Review Materials Science, Ceramics

High-entropy ceramics: Present status, challenges, and a look forward

Huimin Xiang et al.

Summary: High-entropy ceramics are solid solutions of inorganic compounds with diverse crystal and electronic structures, providing large space for property tuning through band structure and phonon engineering. In addition to traditional strengthening, hardening, and low thermal conductivity, HECs exhibit new properties such as colossal dielectric constant and super ionic conductivity. Challenges in processing, characterization, and property predictions are highlighted, along with future directions for material exploration and in-depth characterization.

JOURNAL OF ADVANCED CERAMICS (2021)

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Article Materials Science, Multidisciplinary

Zirconia responses to edge chipping damage induced in conventional and ultrasonic vibration-assisted diamond machining

Afifah Z. Juri et al.

Summary: This study investigates the response of zirconia materials to edge chipping damage induced in conventional and ultrasonic vibration-assisted diamond machining. The results show that the scale of edge chipping damage is influenced by vibration amplitude, and ultrasonic machining can significantly reduce damage caused by brittle fracture.

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T (2021)

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Article Chemistry, Physical

An Active and Robust Air Electrode for Reversible Protonic Ceramic Electrochemical Cells

Yucun Zhou et al.

Summary: A study has reported an air electrode composed of PrBa0.8Ca0.2Co2O5+delta and in situ exsolved BaCoO3-delta nanoparticles, showing minimal polarization resistance and high stability, achieving remarkable performances in R-PCECs with high power density and current density, and demonstrating exceptionally high durability.

ACS ENERGY LETTERS (2021)

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Article Chemistry, Physical

Switching of metal-oxygen hybridization for selective CO2 electrohydrogenation under mild temperature and pressure

Meng Li et al.

Summary: Tuning the Ir-O hybridization can alter the catalyst surface chemical environment, enabling the selective production of either CO or CH4 during electrocatalysis. This advanced electrolyser not only enables CO2 electrohydrogenation but also can be extended to the upgrade of different carbon resources, significantly enhancing the techno-economic feasibility of the process.

NATURE CATALYSIS (2021)

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Article Chemistry, Multidisciplinary

Regulation of Cathode Mass and Charge Transfer by Structural 3D Engineering for Protonic Ceramic Fuel Cell at 400 °C

Wenjuan Bian et al.

Summary: Lowering the operating temperature for solid oxide fuel cell technology deployment by enhancing the cathode oxygen reduction reaction efficiency through 3D engineering on a protonic ceramic fuel cell has been shown to be an effective method for reducing operational costs and improving system durability.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Review Materials Science, Multidisciplinary

Oxides with Mixed Protonic and Electronic Conductivity

Rotraut Merkle et al.

Summary: The study focuses on the defect behavior and applications of oxides with mixed protonic and p-type electronic conductivity, discussing their potential value and future development trends in protonic ceramic electrochemical cells.

ANNUAL REVIEW OF MATERIALS RESEARCH, VOL 51, 2021 (2021)

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Review Materials Science, Ceramics

Recent progress in barium zirconate proton conductors for electrochemical hydrogen device applications: A review

M. Khalid Hossain et al.

Summary: Doped BaZrO3 is a solid ion-conducting material with excellent proton conduction properties for electrolyte applications in electrochemical hydrogen devices operating in the intermediate temperature range of 400-650 degrees C. Enhanced proton transport properties and material fabrication processes of BZO can be achieved through the use of dopants, sintering aid, and various synthesis methods. The review highlights the applications of BZO in various electrochemical hydrogen devices and provides insights into the impact of different factors on the performance of BZO electrolyte materials.

CERAMICS INTERNATIONAL (2021)

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Article Chemistry, Physical

Investigation of the sudden drop of electrolyte conductivity at low temperature in ceramic fuel cell with Ni0.8Co0.15Al0.05LiO2 electrode

Rui Zhang et al.

Summary: The sudden drop in ionic conductivity of GDC electrolyte at low temperatures in ceramic fuel cells with NCAL as electrode was attributed to the solidification of LiOH/Li2CO3 and other compounds from the NCAL anode below 419 degrees C, leading to a significant decrease in peak power density. This change was found to be the direct result of the rapid decrease in ionic conductivity caused by the solidification of LiOH/Li2CO3 and other substances at lower temperatures.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

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Article Chemistry, Physical

Investigation of a self-assembled Sr0.74La0.26CoO3-δ-SrZr0.79Co0.21O3-δ composite with hierarchical structure as intermediate-temperature solid oxide fuel cell cathode

Huiying Qi et al.

Summary: A new series of perovskite composites with nominal compositions of Sr0.8La0.2Co1-xZrxO3-delta were synthesized via one-pot in-situ self-assembly method. The optimum composite showed enhanced charge transport, oxygen reduction, and gas diffusion, with tailored thermal expansion coefficient suitable for solid oxide fuel cell applications. The composite exhibited high electrical conductivity and achieved superior performance as a cathode material in intermediate-temperature solid oxide fuel cells.

JOURNAL OF POWER SOURCES (2021)

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Article Chemistry, Physical

Electrochemically Engineered, Highly Energy-Efficient Conversion of Ethane to Ethylene and Hydrogen below 550 °C in a Protonic Ceramic Electrochemical Cell

Wei Wu et al.

Summary: This study introduces an electrochemically engineered direct conversion process of ethane to produce hydrogen and ethylene, achieving a single-pass ethane conversion of 40% and ethylene yield of 26.7% at 550 degrees C. Compared to traditional ethane steam cracking, this method reduces energy input by 45.1% and improves process energy efficiency by 50.6%.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

Nanocomposites: A New Opportunity for Developing Highly Active and Durable Bifunctional Air Electrodes for Reversible Protonic Ceramic Cells

Yufei Song et al.

Summary: A novel nanocomposites concept for developing bifunctional RePCC electrodes with exceptional performance is reported in this work, optimizing reaction activity in both fuel cell/electrolysis operations. Experimental and computational studies confirm that the composite electrode ensures fast triple-conduction, achieving excellent electrolysis current and reaction activities.

ADVANCED ENERGY MATERIALS (2021)

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Article Energy & Fuels

How green is blue hydrogen?

Robert W. Howarth et al.

Summary: Despite the lower carbon dioxide emissions, the greenhouse gas emissions from the production of blue hydrogen are still quite high due to the release of fugitive methane. The use of blue hydrogen appears challenging to justify on climate grounds, as even with reduced methane emission rates, the emissions are still greater than simply burning natural gas.

ENERGY SCIENCE & ENGINEERING (2021)

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Article Chemistry, Physical

PN Heterostructure Interface-Facilitated Proton Conduction in 3C-SiC/Na0.6CoO2 Electrolyte for Fuel Cell Application

Faze Wang et al.

Summary: The research shows that 3C-SiC can be modulated into a proton conducting material through a semiconductor heterostructure interface mechanism, leading to improved performance of fuel cells.

ACS APPLIED ENERGY MATERIALS (2021)

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Article Chemistry, Physical

Toward Understanding of Temperature Dependence of an Advanced Ceramic Fuel Cell with Ni0.8Co0.15Al0.05LiO2 as an Electrode

Zhuo Chen et al.

Summary: This study investigated the impact of initial reduction temperature of the NCAL anode on the performance of ceramic fuel cells. The results showed that the diffusion rate of LiOH/Li2CO3 mixture into the GDC electrolyte increased with higher initial reduction temperatures, affecting the formation of ion conduction channels and significantly influencing the electrochemical performance of the cells.

ACS APPLIED ENERGY MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Exceptionally high performance of protonic ceramic fuel cells with stoichiometric electrolytes

Mingi Choi et al.

Summary: Researchers have successfully developed a new protonic ceramic fuel cell electrolyte with high electrochemical performance, surpassing values of previously reported PCFCs without the need for complex engineering, which has advanced the technology in this field.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

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Review Chemistry, Multidisciplinary

Multi-Sites Electrocatalysis in High-Entropy Alloys

Hongdong Li et al.

Summary: High-entropy alloys have unique advantages in electrocatalysis, allowing for the formation of new and tailorable active sites, but further exploration is needed in catalyst design, element interaction, and active site determination. This review focuses on important progress in multi-sites electrocatalysis in HEAs, providing a basis for element selection and design, as well as highlighting remaining challenges and future research directions.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Cation-Deficient Perovskites for Clean Energy Conversion

Chao Su et al.

Summary: This article discusses the importance of functional materials, particularly highly efficient and cost-effective electrocatalysts, in clean energy conversion technologies. It highlights the use of perovskite oxides with cation deficiency as key materials for optimizing catalytic activity in various energy conversion and storage applications. By tailoring the intrinsic properties of perovskites through cation deficiency, improvements in sintering behavior and catalytic activity are achieved, ultimately leading to significant enhancements in the performance of energy conversion systems.

ACCOUNTS OF MATERIALS RESEARCH (2021)

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Review Chemistry, Multidisciplinary

Low-temperature ethylene production for indirect electrification in chemical production

Wei Wu et al.

Summary: Electrification is being explored by the chemical industry to improve energy efficiency and reduce greenhouse-gas emissions, with a focus on electrochemical-facilitated ethane dehydrogenation for ethylene production. The use of low-temperature electrochemical ethylene production technology (LoTempLene) is highlighted, along with a detailed analysis of energy and cost implications compared to traditional steam cracking, and key challenges and possible solutions for this process are discussed.

CELL REPORTS PHYSICAL SCIENCE (2021)

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Article Chemistry, Physical

The effect of an anode functional layer on the steam electrolysis performances of protonic solid oxide cells

Chunmei Tang et al.

Summary: By using La0.5Sr0.5CoO3-delta (LSC) thin film as an anode functional layer, the electrolysis performance of Protonic solid oxide steam electrolysis cells (P-SOECs) based on BaZrxCe0.8-xYb0.1Y0.1O3-delta proton conductors can be significantly improved. This improvement reduces both the ohmic and polarization resistances of the cell at high temperatures, leading to increased electrolysis current and Faraday efficiency.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Multidisciplinary

Promotion of oxygen reduction reaction on a double perovskite electrode by a water-induced surface modification

Jun Hyuk Kim et al.

Summary: This study presents a highly efficient air electrode composed of PrBa0.8Ca0.2Co2O5+delta (PBCC) backbone coated with BaCoO3-delta (BCO) nanoparticles, exhibiting remarkable electrocatalytic activity for oxygen reduction reaction and excellent tolerance to water vapor. The electrode demonstrates stable performance in wet air conditions and the correlation between surface chemistry and electrochemical behavior is essential for understanding the mechanisms of electrocatalytic processes.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

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Article Chemistry, Physical

A straight, open and macro-porous fuel electrode-supported protonic ceramic electrochemical cell

Yuxin Pan et al.

Summary: By tailoring the structure of the electrode substrate to facilitate mass transport, the protonic ceramic electrochemical cell demonstrates lower polarization resistances and higher power outputs, showing better electrochemical performance compared to dry-pressed cells under the same conditions.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Multidisciplinary

Transition from perovskite to misfit-layered structure materials: a highly oxygen deficient and stable oxygen electrode catalyst†

Muhammad Saqib et al.

Summary: A novel misfit-layered compound GCCCO has been reported as a superior and durable bifunctional oxygen electrode material for RPCCs, showing high power densities and current densities. The superior catalytic performances of GCCCO are attributed to its oxygen defect rich structure, triple conducting property, needle-like grain morphology, and suitable thermal expansion coefficient.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

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Article Chemistry, Physical

Ni-based bimetallic nano-catalysts anchored on BaZr0.4Ce0.4Y0.1Yb0.1O3-δ for internal steam reforming of methane in a low-temperature proton-conducting ceramic fuel cell

Kyungpyo Hong et al.

Summary: The study found that 6Ni2Rh exhibited the highest catalytic activity, while 6Ni2Rh and 6Ni2Co showed higher catalytic performance at low steam-to-carbon ratios. They displayed lower dependence on gas flow rate, higher resistance to carbon formation, and maintained catalytic activity during long-term operation.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Physical

Activity of layered swedenborgite structured Y0.8Er0.2BaCo3.2Ga0.8O7+δ for oxygen electrode reactions in at intermediate temperature reversible ceramic cells

Ji-Seop Shin et al.

Summary: The novel layered swedenborgite structure Y0.8Er0.2BaCo3.2Ga0.8O7+delta (YEBCG) catalyst shows excellent performance in high-performance SOFCs and RPCCs, including thermal stability, fast reaction rates, and outstanding power density.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Materials Science, Ceramics

Fabrication of ceramic composite anode at low temperature for high performance protonic ceramic fuel cells

Erdienzy Anggia et al.

CERAMICS INTERNATIONAL (2020)

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Review Energy & Fuels

Hydrogen from solar energy, a clean energy carrier from a sustainable source of energy

Seyed Ehsan Hosseini et al.

INTERNATIONAL JOURNAL OF ENERGY RESEARCH (2020)

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Article Chemistry, Physical

Tailoring a micro-nanostructured electrolyte-oxygen electrode interface for proton-conducting reversible solid oxide cells

Ce Sun et al.

JOURNAL OF POWER SOURCES (2020)

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Review Chemistry, Multidisciplinary

CO2 Reduction: From Homogeneous to Heterogeneous Electrocatalysis

Sheng Zhang et al.

ACCOUNTS OF CHEMICAL RESEARCH (2020)

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Article Chemistry, Multidisciplinary

A Cobalt-Free Multi-Phase Nanocomposite as Near-Ideal Cathode of Intermediate-Temperature Solid Oxide Fuel Cells Developed by Smart Self-Assembly

Yufei Song et al.

ADVANCED MATERIALS (2020)

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Article Electrochemistry

Enhancement of Electrochemical Properties, Impedance and Resistances of Micro-tubular IT-SOFCs with Novel Asymmetric Structure Based on BaZr0.1Ce0.7Y0.1Yb0.1O3-δ Proton Conducting Electrolyte

Y. Dong et al.

FUEL CELLS (2020)

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Article Chemistry, Physical

Optimization of electrode-electrolyte interface structure for solid oxide fuel cell cathode

An He et al.

JOURNAL OF POWER SOURCES (2020)

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Article Materials Science, Ceramics

The rapid one-step fabrication of bilayer anode for protonic ceramic fuel cells by phase inversion tape casting

Chaoliang Geng et al.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2020)

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Article Chemistry, Physical

High oxide ion and proton conductivity in a disordered hexagonal perovskite

Sacha Fop et al.

NATURE MATERIALS (2020)

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Article Chemistry, Physical

Electrochemical Dehydrogenation of Ethane to Ethylene in a Solid Oxide Electrolyzer

Xirui Zhang et al.

ACS CATALYSIS (2020)

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Article Chemistry, Physical

Electrochemical promotion of Ru nanoparticles deposited on a proton conductor electrolyte during CO2 hydrogenation

Dimitrios Zagoraios et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2020)

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Article Materials Science, Ceramics

A high-performance intermediate-to-low temperature protonic ceramic fuel cell with in-situ exsolved nickel nanoparticles in the anode

Zhijun Liu et al.

CERAMICS INTERNATIONAL (2020)

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Review Physics, Applied

Proton-conducting oxides for energy conversion and storage

Chuancheng Duan et al.

APPLIED PHYSICS REVIEWS (2020)

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Review Chemistry, Physical

Is the H2 economy realizable in the foreseeable future? Part I: H2 production methods

Hassan Nazir et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2020)

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Article Multidisciplinary Sciences

A general method to synthesize and sinter bulk ceramics in seconds

Chengwei Wang et al.

SCIENCE (2020)

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Article Multidisciplinary Sciences

Self-sustainable protonic ceramic electrochemical cells using a triple conducting electrode for hydrogen and power production

Hanping Ding et al.

NATURE COMMUNICATIONS (2020)

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Article Chemistry, Physical

Facet-Dependent Selectivity of Cu Catalysts in Electrochemical CO2 Reduction at Commercially Viable Current Densities

Gian Luca De Gregorio et al.

ACS CATALYSIS (2020)

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Article Chemistry, Physical

Fast and Stable Proton Conduction in Heavily Scandium-Doped Polycrystalline Barium Zirconate at Intermediate Temperatures

Junji Hyodo et al.

ADVANCED ENERGY MATERIALS (2020)

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Article Chemistry, Multidisciplinary

High Proton Conductivity in Ba5Er2Al2ZrO13, a Hexagonal Perovskite-Related Oxide with Intrinsically Oxygen-Deficient Layers

Taito Murakami et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2020)

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Article Nanoscience & Nanotechnology

Tri-Doped BaCeO3-BaZrO3 as a Chemically Stable Electrolyte with High Proton-Conductivity for Intermediate Temperature Solid Oxide Electrolysis Cells (SOECs)

Sathish Rajendran et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

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Article Chemistry, Multidisciplinary

A New Family of Proton-Conducting Electrolytes for Reversible Solid Oxide Cells: BaHfxCe0.8-xY0.1Yb0.1O3-δ

Ryan Murphy et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

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Review Energy & Fuels

Toward Reducing the Operation Temperature of Solid Oxide Fuel Cells: Our Past 15 Years of Efforts in Cathode Development

Guangming Yang et al.

ENERGY & FUELS (2020)

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Article Thermodynamics

Energy storage and hydrogen production by proton conducting solid oxide electrolysis cells with a novel heterogeneous design

Libin Lei et al.

ENERGY CONVERSION AND MANAGEMENT (2020)

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Article Chemistry, Physical

Enhanced Cr-tolerance of an SOFC cathode by an efficient electro-catalyst coating

Kai Pei et al.

NANO ENERGY (2020)

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Review Chemistry, Physical

Progress in metal-supported solid oxide electrolysis cells: A review

Michael C. Tucker

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2020)

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Article Chemistry, Physical

Manipulating cation nonstoichiometry towards developing better electrolyte for self-humidified dual-ion solid oxide fuel cells

Fan He et al.

JOURNAL OF POWER SOURCES (2020)

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Article Chemistry, Physical

Development of high-performance anode/electrolyte/cathode micro-tubular solid oxide fuel cell via phase inversion-based co-extrusion/co-sintering technique

Mazlinda Ab Rahman et al.

JOURNAL OF POWER SOURCES (2020)

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Article Chemistry, Physical

Co-generation of electricity and olefin via proton conducting fuel cells using (Pr0.3Sr0.7)0.9Ni0.1Ti0.9O3 catalyst layers

Nai Shi et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2020)

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Article Chemistry, Multidisciplinary

Porous an hollow nanofibers for solid oxide fuel cell electrodes

Minwoo Ahn et al.

KOREAN JOURNAL OF CHEMICAL ENGINEERING (2020)

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Article Materials Science, Coatings & Films

Effects of texture spacing and bulges of bionic sinusoidal texture on the adhesion properties and fracture mechanism of plasma-sprayed coatings

Xianghua Zhan et al.

SURFACE & COATINGS TECHNOLOGY (2020)

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Review Materials Science, Multidisciplinary

Electrolyte materials for intermediate-temperature solid oxide fuel cells

Huangang Shi et al.

PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL (2020)

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Article Chemistry, Physical

Cogeneration of ethylene and electricity in symmetrical protonic solid oxide fuel cells based on a La0.6Sr0.4Fe0.8Nb0.1Cu0.1O3-δ electrode

Jun Li et al.

JOURNAL OF MATERIALS CHEMISTRY A (2020)

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Article Electrochemistry

Implications of Aqueous Processing for High Energy Density Cathode Materials: Part II. Water-Induced Surface Species on LiNi0.8Co0.15Al0.05O2

Michael Hofmann et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2020)

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Article Materials Science, Multidisciplinary

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Improved electrical properties of Nb doped BaCe0.9Y0.1O2.95 electrolyte for intermediate temperature SOFCs obtained by autocombustion method

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High performance air electrode for solid oxide regenerative fuel cells fabricated by infiltration of nano-catalysts

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