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Article
Chemistry, Applied
Rui Yang et al.
Summary: To enhance the electrocatalytic activity and stability of LSCF oxygen electrodes in RSOCs, a Pd-LSCF composite oxygen electrode was prepared using a conventional physical mixed method. The Pd-LSCF|GDC|YSZ|Ni-YSZ cell exhibited excellent electrochemical performance in both SOFC and SOEC modes. The power density of the cell in the SOFC mode reached 1.73 W/cm(2) at 800 degrees C, higher than that of the LSCF oxygen electrode. In the SOEC mode, the current density at 1.5 V was 1.67 A/cm(2) at 800 degrees C under 50 vol% steam concentration. The long-term reversible operation of the RSOCs showed a low degradation rate of 2.2%/100 h and 2.5%/100 h in the SOEC and SOFC modes, respectively. These findings demonstrate that the incorporation of Pd into LSCF electrode significantly improves its electrochemical performance in RSOCs.
JOURNAL OF RARE EARTHS
(2023)
Review
Chemistry, Physical
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)
Article
Materials Science, Ceramics
Konosuke Watanabe et al.
Summary: This study compares the electrochemical performance of composite cathodes in anode-supported protonic ceramic fuel cells using La(0.6)Sr(0.4)CoxFe(1-x)O(3-delta) and BaZr0.8Yb0.2O3-delta (BZYb) sintered at different temperatures. The cathodes sintered at 1100 degrees C showed better performance due to increased proton conductive network paths. PCFCs with LSCF-BZYb, LSC-BZYb, and LSF-BZYb composite cathodes exhibited power densities of 0.25, 0.19, and 0.07 W cm(-2), respectively, at an operating temperature of 600 degrees C. The presence of Co was found to be important for high catalytic activity in cathode reactions.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Environmental
Wenwen Zhang et al.
Summary: A novel triple-conducting composite cathode for protonic ceramic fuel cells, BaCo0.7(Zr0.8Y0.2)0.3O3-delta (BCZY), is developed by replacing cerium with zirconium in BaCo0.7(Ce0.8Y0.2)0.3O3-delta (BCCY) to construct strongly interacting interfaces. BCZY exhibits superior oxygen reduction reaction (ORR) activity and stability, with a polarization resistance of 0.25 omega cm2 at 600 degrees C and excellent performance maintained for 206 hours. The enhanced ORR activity and stability are attributed to the high concentration of active sites and the strong hydration capability at strongly interacting interfaces of Co-rich and Zr-rich phases introduced by interdiffusion of Co and Zr.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Ziling Wang et al.
Summary: Morphology regulation is an effective way to improve the electrocatalytic activity of SOFC cathodes, and nanofibers have been confirmed to have advantages in this aspect. This study employed a sintering-free method to in-situ self-assemble LCaFN nanofibers onto the YSZ electrolyte surface, which showed impressive performance compared to previous work. These findings demonstrate the promising strategy of combining fiber cathodes and in-situ self-assembly techniques for high-performance SOFCs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Multidisciplinary Sciences
Yaguang Li et al.
Summary: Cu-based high-entropy two-dimensional oxide is synthesized using a PVP templated method and shows enhanced sintering resistance and CO2 hydrogenation activity. It achieves a record photochemical energy conversion efficiency in photothermal CO2 hydrogenation under ambient sunlight irradiation.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
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)
Article
Materials Science, Ceramics
M. V. Yurchenko et al.
Summary: Composite electrode materials were successfully obtained by mixing PrBaCo2O6-delta (PBCO) and Ca3Co4O9 +/-delta (CCO) oxides. Long term sintering and SOFC's operating conditions did not cause any interactions between the components, as shown by X-ray diffraction analysis. Increase in CCO content resulted in a noticeable decrease in thermal expansion coefficients, while the electrical conductivity of ceramics decreased negligibly. The obtained powdered composites had a developed microstructure and excellent adhesion with Ce0.8Sm0.2O1.9 dense support. The use of CCO as a thermal expansion coefficient lowering admixture to PBCO was found to be a more effective approach compared to ceria-based oxides.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Caichen Yang et al.
Summary: Solid oxide electrolysis cell (SOEC) is a promising device for energy conversion by efficiently converting CO2 to CO for renewable energy storage. Developing active and stable cathode catalysts for CO2 reduction reaction (CO2-RR) is crucial for SOECs. In this study, fluorine doping on La0.6Sr0.4Fe0.8Ni0.2O3-delta (LSFN) cathode catalyst was investigated to enhance its electrocatalytic performance for CO2-RR. The results showed that F-doped LSFN had more oxygen vacancies and better CO2 adsorption ability, leading to improved electrolysis current density and durability. Mechanistic analysis revealed that F-doping promoted the formation of intermediates and the rate-determining step of the reaction. This work demonstrates the potential of anion-doped LSFNF0.1 as a promising cathode catalyst for SOEC direct CO2 electrolysis and provides insights for future development of cathode catalysts for SOECs.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Yinchun Shi et al.
Summary: The study reveals that the high entropy effect in HEALMO materials goes beyond traditional doping effects. HEALMOs exhibit higher crystallographic symmetry and enhanced stability at larger A site cation size differences, while also contributing to the maintenance of electrical conductivity in the high temperature range.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Dan Zou et al.
Summary: Compared to conventional oxygen-ion-conducting solid oxide fuel cells, proton ceramic fuel cells show better performance at low temperatures. However, most proton ceramic fuel cells have lower power outputs due to the lack of suitable cathode materials. This study presents a cobalt-free triple-conducting perovskite-based nanocomposite as a highly active and stable cathode for proton ceramic fuel cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Materials Science, Multidisciplinary
Shuai Wu et al.
Summary: The Sr and Zn co-doped LaMnO3 (LSMZ) cathode demonstrates superior performance and stability in proton-conducting solid oxide fuel cells (H-SOFCs), outperforming all reported LSM-based H-SOFCs; LSMZ is stable against CO2 and exhibits good long-term stability, paving a new way for research on intermediate temperature SOFC cathodes.
SCIENCE CHINA-MATERIALS
(2022)
Article
Engineering, Environmental
Jin Li et al.
Summary: To address the stability issue of La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) cathode, researchers propose a novel approach of introducing La(0.9)5CoO(3-delta) (LC95) thin film onto the surface of the porous LSCF scaffold. The hybrid cathode (LSCF@LC95) shows lower polarization resistance and remarkable long-term stability compared to the pristine LSCF cathode.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Yitong Li et al.
Summary: This study investigates the performance of a novel Pr0.8Ca0.2Fe0.8Co0.2O3-8 oxide as an air electrode for RSOCs. The results demonstrate that this electrode achieved high power density and electrolysis current density under high temperature conditions, while maintaining stability and reversibility.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Chuan Zhou et al.
Summary: The excessive thermal expansion behavior of Co-based electrode often leads to cell degradation or delamination. In this study, a novel single-phase electrode material BSNCF was developed, which showed great stability and performance under harsh thermal cycling conditions.
JOURNAL OF POWER SOURCES
(2022)
Article
Materials Science, Ceramics
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)
Article
Nanoscience & Nanotechnology
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)
Review
Chemistry, Multidisciplinary
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)
Article
Electrochemistry
Emanuele Quattrocchi et al.
Summary: Electrochemical impedance spectroscopy (EIS) is widely used to study electrochemical systems, but interpreting the data is challenging. The distribution of relaxation times (DRT) has emerged as a complementary approach to resolve these issues. A novel deconvolution method based on deep neural networks (DNNs) has been proposed to analyze multidimensional EIS spectra effectively.
ELECTROCHIMICA ACTA
(2021)
Article
Multidisciplinary Sciences
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.
Article
Materials Science, Multidisciplinary
Wenjie Wang et al.
Summary: LCaFN, a Sr-Co-free perovskite oxide, shows high electrical conductivity, TEC compatibility, and improved stability, with high ORR activity in RSOCs. It has potential applications as an air electrode material.
SCIENCE CHINA-MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Akanksha Yadav et al.
Summary: Ceramic fuel cells offer more advantages over PMFCs due to their fuel flexibility and high performance at elevated temperature. Simultaneous substitution of K and Ga can improve the low ionic conductivity issues of BaZrO3 based materials at high temperature.
Article
Chemistry, Physical
Quan Yang et al.
Summary: The high-entropy cathode HEP has shown outstanding electrochemical performance in SOFCs, indicating promising potential applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Yingqin Yu et al.
CERAMICS INTERNATIONAL
(2020)
Article
Nanoscience & Nanotechnology
Yun Liu et al.
ACS APPLIED MATERIALS & INTERFACES
(2020)
Review
Chemistry, Multidisciplinary
Qianqian Ji et al.
ENERGY & ENVIRONMENTAL SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Zhaowu Tang et al.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Snehashish Tripathy et al.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2018)
Article
Materials Science, Ceramics
Naveed Mushtaq et al.
CERAMICS INTERNATIONAL
(2018)
Article
Materials Science, Ceramics
Wei Cai et al.
CERAMICS INTERNATIONAL
(2018)
Article
Electrochemistry
Jin Li et al.
ELECTROCHIMICA ACTA
(2018)
Review
Materials Science, Multidisciplinary
Weiran Zhang et al.
SCIENCE CHINA-MATERIALS
(2018)
Article
Engineering, Chemical
Priscila Lemes Rachadel et al.
SEPARATION AND PURIFICATION TECHNOLOGY
(2017)
Article
Engineering, Chemical
Xiaozhen Zhang et al.
SEPARATION AND PURIFICATION TECHNOLOGY
(2017)
Article
Materials Science, Ceramics
Mao Sen Wang et al.
CERAMICS INTERNATIONAL
(2015)
Article
Multidisciplinary Sciences
Chuancheng Duan et al.
Article
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Siwei Wang et al.
SOLID STATE IONICS
(2012)
