☆ 4.7 Review

Effects of oxygen-containing functional groups on carbon materials in supercapacitors: A review

MATERIALS & DESIGN (2023)

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Article Chemistry, Physical

Flexible SnSe2/N-doped porous carbon-fiber film as anode for high-energy-density and stable sodium-ion batteries

Chao Wang et al.

Summary: By designing and preparing a flexible film electrode of SnSe2/nitrogen-doped porous carbon-fiber (SnSe2/NPC) with a porous carbon-coated architecture, the issues of volume expansion and particle aggregation of tin selenide during cycling can be overcome, improving the rate capability and cycling stability of sodium-ion batteries.

JOURNAL OF POWER SOURCES (2023)

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Article Chemistry, Inorganic & Nuclear

Co-doped MnO2 with abundant oxygen vacancies as a cathode for superior aqueous magnesium ion storage

Liming Xu et al.

Summary: This study proposes and evaluates Co-doped MnO2 with abundant oxygen vacancies as the cathode material for aqueous magnesium ion hybrid supercapacitors (MHSs). The decrease in the combined valence of Mn caused by Co doping leads to more oxygen vacancies, which improves the electronic conductivity and promotes the adsorption/desorption behavior of Mg2+. Additionally, Co intercalation enhances the stability of the electrode material. An MHS based on the Co-MnO2 cathode exhibits excellent energy density and long-term cycling life.

INORGANIC CHEMISTRY FRONTIERS (2023)

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Review Chemistry, Multidisciplinary

Recent Breakthroughs in Supercapacitors Boosted by Macrocycles

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Summary: This review presents the applications of macrocycles in supercapacitor systems, highlighting the advantages of organic macrocycles in improving the electrochemical performance of electrodes and electrolytes through supramolecular strategies.

CHEMSUSCHEM (2023)

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Review Nanoscience & Nanotechnology

Status and Opportunities of Zinc Ion Hybrid Capacitors: Focus on Carbon Materials, Current Collectors, and Separators

Yanyan Wang et al.

Summary: Zinc ion hybrid capacitors (ZIHCs) have the potential to be competitive in future electrochemical energy storage applications, combining the high power of supercapacitors and the high energy of zinc ion batteries. Carbon-based materials are considered promising candidates for ZIHC cathodes due to their cost-effectiveness, high electronic conductivity, chemical inertness, controllable surface states, and tunable pore architectures. This review discusses the structural design and electrochemical properties of carbon-based cathode materials with various dimensions for ZIHCs, as well as the selection of compatible and robust current collectors and separators. The challenges and prospects of ZIHCs are highlighted to guide the innovative development of carbon-based cathode materials and novel ZIHCs.

NANO-MICRO LETTERS (2023)

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Article Polymer Science

Heteroatom-Enhanced Porous Carbon Materials Based on Polybenzoxazine for Supercapacitor Electrodes and CO2 Capture

Thirukumaran Periyasamy et al.

Summary: HCPCs were synthesized using melamine, eugenol, and formaldehyde and activated at different temperatures. The introduction of melamine and eugenol resulted in bonded nitrogen and oxygen in the porous carbons. The activated carbon materials exhibited suitable properties for electrode materials in supercapacitors, with high surface areas, nitrogen and oxygen contents, and excellent rate capability and longevity. The nitrogen-containing activated porous carbon also showed significant CO2 adsorption capacity.

POLYMERS (2023)

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Article Chemistry, Physical

Yolk-shell porous Fe3O4@C anchored on graphene as anode for Li-ion half/full batteries with high rate capability and long cycle life

Xinjin Gao et al.

Summary: A yolk-shell porous Fe3O4@C/ graphene nanosheet structure is designed to address the volume change and dissolution/aggregation issues of Fe3O4 anode materials. This structure not only provides space for volume change but also restricts overexpansion, resulting in improved capacity retention. Additionally, the porous Fe3O4 promotes ion transport, and the carbon shell enhances overall conductivity.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2023)

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Article Materials Science, Multidisciplinary

Effect of pore structures on desolvation of carbon materials as the electrode materials of supercapacitors: A first-principles study

Xu Zhang et al.

Summary: In this work, the complete desolvation behavior of Li+, Na+, and K+ at the EPP in the pore structure of porous carbon materials in the aqueous solution is studied by first-principles calculations. It is found that solvated Li+ can be completely desolvated in both EPP and BPP, while Na+ and K+ do not undergo desolvation in EPP. This study has important theoretical significance for designing the pore structure of porous carbon materials.

COMPUTATIONAL MATERIALS SCIENCE (2022)

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Article Energy & Fuels

Corn Stalk-Based Carbon Microsphere/Reduced Graphene Oxide Composite Hydrogels for High-Performance Symmetric Supercapacitors

Jiankai Wang et al.

Summary: By preparing carbon microspheres from waste biomass corn stalks and inserting them into composite hydrogels, the restacking of graphene sheets was effectively inhibited, resulting in high-performance electrode materials with excellent electrochemical performance. This work is of great significance for the high value-added conversion of waste biomass and the preparation of supercapacitors.

ENERGY & FUELS (2022)

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Article Chemistry, Physical

Difference in deprotonation for oxygen-containing groups on sp2 and sp3 carbons

Alexey Vervald et al.

Summary: The hybridization of the surface of carbon nanoparticles affects the properties of surface carboxyl and hydroxyl groups, leading to differences in deprotonation behavior. Theoretical estimates show that isolated carboxyl groups on sp(2)/sp3 hybridized carbon have different pK(a) ranges, and the same applies to hydroxyl groups. Experimentally, changes in zeta-potentials of oxidized detonation nanodiamonds confirm these theoretical calculations.

FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES (2022)

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Article Chemistry, Physical

Molybdenum doped induced amorphous phase in cobalt acid nickel for supercapacitor and oxygen evolution reaction

Shanshan Xiong et al.

Summary: Reasonable structural design and metal-doping play significant roles in optimizing electrochemical energy storage and conversion. The Mo-doped NiCo2O4 samples exhibit excellent supercapacitor performance and electrocatalytic activity, with a specific capacitance of 3970 mF cm(-2) at 1 mA cm(-2) and remarkable rate performance. The nanocomposites also show remarkable long-term stability as an electrocatalyst during the oxygen evolution reaction.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

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Article Nanoscience & Nanotechnology

Boosting Low-Temperature Resistance of Energy Storage Devices by Photothermal Conversion Effects

Fei Yu et al.

Summary: Improving the performance of flexible supercapacitors in low-temperature environments using solar thermal energy. The capacitance of the supercapacitor was greatly enhanced by the photothermal conversion ability of carbonized melamine sponge, and the addition of surface plasmonic nanomaterials further improved the performance. This study provides new insights on the application of solar energy and the design of energy storage devices with excellent low-temperature resistance.

ACS APPLIED MATERIALS & INTERFACES (2022)

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Article Materials Science, Textiles

Electrochemical and Hydrothermal Activation of Carbon Fiber Supercapacitor Electrode

Yibing Xie

Summary: Carbon fibers treated with electrochemical and hydrothermal activation show differences in surface area and functional groups, resulting in varied capacitive performance. HACF exhibits higher capacitance and better electroactivity than EACF, making it a promising candidate for energy storage applications.

FIBERS AND POLYMERS (2022)

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Article Chemistry, Physical

Uniform polypyrrole electrodeposition triggered by phytic acid-guided interface engineering for high energy density flexible supercapacitor

Yashi Chen et al.

Summary: Unevenly distributed polypyrrole films/coatings with extensive dead volumes via electrodeposition pose a challenge for high energy density flexible supercapacitors. In this study, a phytic acid-guided graphite carbon felt/polypyrrole 3D porous composite was fabricated with less dead volumes, leading to a higher areal energy density. The activation of phytic acid on the surface of carbon felt increased defects and oxygen-containing groups, which synergistically promoted the formation of perfect PPy films with less dead volume.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

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Article Chemistry, Physical

Pore structure regulation of hierarchical porous carbon derived from coal tar pitch via pre-oxidation strategy for high-performance supercapacitor

Xiaoxia Yang et al.

Summary: Carbon materials with rational pore structure have been designed and constructed via a simple and low-cost route, exhibiting excellent electrochemical performances for supercapacitor applications.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

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Article Chemistry, Physical

Covalently Functionalized Hydroxyl-Rich Few-Layer Graphene for Solid-State Proton Conduction and Supercapacitor Applications

Palak Mehra et al.

Summary: Covalently functionalized hydroxyl-rich few-layer graphenes (HRFGs) were synthesized from oxygen-functionalized few-layer graphene (OFG) via 1,3-cycloaddition reaction, resulting in HRFG-96 after 96 h of reaction. HRFG-96 exhibited outstanding proton conductivity and thermal stability at both room temperature and high humidity conditions. The material also showed enhanced capacitance and cyclic stability as a supercapacitor electrode material, attributed to excess hydroxy functionalization and improved charge transport properties.

JOURNAL OF PHYSICAL CHEMISTRY C (2022)

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Non-thermal plasma enhances performances of biochar in wastewater treatment and energy storage applications

Rusen Zhou et al.

Summary: Surface functionalization of biochar with non-thermal plasma can enhance metal adsorption rate and capacity, while plasma treatment followed by KOH activation can lead to a carbon product with larger surface area and improved supercapacitor performance. This study offers insights for enhancing surface functionality and application performance of biochar using non-thermal techniques.

FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING (2022)

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Article Chemistry, Applied

Reversible faradaic reactions involving redox mediators and oxygen-containing groups on carbon fiber electrode for high-performance flexible fibrous supercapacitors

Soobeom Lee et al.

Summary: Flexible fibrous supercapacitors (FFS) are considered as ideal energy storage devices for wearable electronics due to their high energy density, high safety, long cycle life, and simple manufacturing process. A novel FFS-SARE composed of surface-activated carbon fibers and a redox additive gel polymer electrolyte was fabricated, showing outstanding electrochemical performance and remarkable ultrafast cycling stability.

JOURNAL OF ENERGY CHEMISTRY (2022)

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Article Materials Science, Multidisciplinary

Surface Functionalization of Carbon Fiber for High-Performance Fibrous Supercapacitor

Young-Geun Lee et al.

Summary: Fibrous supercapacitors face challenges due to the active material of carbon fiber, but surface-activated CF can improve their performance.

KOREAN JOURNAL OF MATERIALS RESEARCH (2022)

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Article Chemistry, Physical

Green synthesis and electrochemical properties of A3(PO4)2 (A = Mn, Zn, and Co) hydrates for supercapacitors with long-term cycling stability

Yongbin Hua et al.

Summary: Energy storage materials, particularly supercapacitors, are essential for promoting sustainable development in high energy consumption societies. This study presents a green and simple synthesis strategy to fabricate A(3)(PO4)(2) hydrates as high-performance supercapacitor electrodes, demonstrating excellent electrochemical properties and cycling stability.

JOURNAL OF POWER SOURCES (2022)

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Article Chemistry, Multidisciplinary

Surprising Hydrophobic Polymer Surface with a High Content of Hydrophilic Polar Groups

Mingru Li et al.

Summary: This study investigates the influence mechanism of polar groups on hydrophobicity by modifying the surface polar moieties of epoxy resin. The results show that even with a significant increase in polar groups, the modified epoxy resin surface remains hydrophobic. By calculating absorption parameters using molecular simulations, the study reveals the controlling factors of wetting properties on solid surfaces and clarifies the nonlinear relationship between polar groups and hydrophilicity.

LANGMUIR (2022)

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Article Energy & Fuels

Preparation of High-Performance Porous Carbon Materials by Citric Acid-Assisted Hydrothermal Carbonization of Bamboo and Their Application in Electrode Materials

Fubin Chen et al.

Summary: This study prepares porous carbon materials with different properties by citric acid-assisted hydrothermal carbonization and KOH activation. The addition of citric acid improves the carbonization degree, content of oxygen-containing functional groups, and specific surface area. The highest specific surface area achieved is 3132 m2 g-1, and the specific capacitance of the material reaches 435.5 F g-1 in a three-electrode system. After 30,000 charge and discharge cycles, a retention rate of 97% is achieved.

ENERGY & FUELS (2022)

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Article Electrochemistry

Realization and characterization of flexible supercapacitors based on doped graphene electrodes

Loubna Chetibi et al.

Summary: This work focuses on the development of a flexible supercapacitor using graphene-doped metal oxides graphene/polypyrrole (GP/PPY) nanocomposites as electrodes. Graphene and polypyrrole are prepared through exfoliation and in situ polymerization, while metal oxide nanoparticles (Fe2O3 and NiO) are synthesized using a green synthesis technique based on olive leaves' extract. The gel polymer of polyvinyl alcohol (PVA)-potassium hydroxide (KOH)-hydroquinone (HQ) is used as electrolyte and separator. XRD, FTIR, Raman spectroscopy, and SEM are employed to characterize the structural and morphological properties of the components. Electrochemical tests reveal a stable supercapacitor with different specific capacity values depending on the combination of metal oxide nanoparticles (Fe2O3 and NiO) and separators (PVA, KOH, HQ, and GP/PPY).

JOURNAL OF SOLID STATE ELECTROCHEMISTRY (2022)

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Article Chemistry, Multidisciplinary

All-in-One Electric Double Layer Supercapacitors Based on CH3NH3PbI3 Perovskite Electrodes

Seher Guz et al.

Summary: This study explores the use of organic-inorganic halide perovskites as electrodes for supercapacitors and investigates the impact of optimization parameters on the capacitor performance. The results show that Bi3+-substituted perovskite electrodes exhibit the highest power density, and the fabricated SC devices demonstrate good cyclability.

ACS OMEGA (2022)

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Article Chemistry, Physical

Biomass blend derived porous carbon for aqueous supercapacitors with commercial-level mass loadings and enhanced energy density in redox-active electrolyte

Bhaskar J. Choudhury et al.

Summary: In this study, oxygen-enriched porous carbon material (PC-x) was successfully prepared through co-pyrolysis and activation of a ternary mixture of biomass. The PC-x exhibited excellent characteristics and performance in supercapacitor applications, showing high capacitance, rate capability, and cycle stability. The approach of using biomass blends offers flexibility for large-scale and sustainable production of carbon materials for energy storage.

APPLIED SURFACE SCIENCE (2022)

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Article Chemistry, Physical

A novel perspective on interfacial interactions between polypyrrole and carbon materials for improving performance of supercapacitors

Jie Liu et al.

Summary: This study investigates the interfacial interactions between carbon materials and PPy by forming novel freestanding composite electrodes via depositing PPy on the surface of carbon foam. The results show that the introduction of different oxygen-containing functional groups affects the cycling stability of composite materials. Furthermore, intermolecular interactions also impact the redox properties of composite electrodes.

APPLIED SURFACE SCIENCE (2022)

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Article Chemistry, Physical

The continuous porous PEDOT:PSS film improves wettability and flexibility of the rGO/CoFe2O4 paper electrodes for symmetric supercapacitors

Jia Song et al.

Summary: This study successfully designed a continuous porous conductive polymer PEDOT:PSS film coated graphene and CoFe2O4 nanospheres composite paper electrode material, which improved the toughness and wettability of the graphene composite paper, and enhanced the rate performance and electrochemical activity. The symmetric supercapacitor made from this material can be charged in both positive and negative directions, and exhibits excellent electrochemical performance.

APPLIED SURFACE SCIENCE (2021)

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Review Energy & Fuels

Emergence of Novel 2D Materials for High-Performance Supercapacitor Electrode Applications: A Brief Review

Merin Tomy et al.

Summary: This review explores the synthesis and application of novel 2D materials as supercapacitor electrodes, including graphene, MXene, transition metal dichalcogenides (TMDs), hexagonal boron nitride (h-BN), carbon nitrides, metal oxides/hydroxides, and black phosphorus (BP), which can significantly enhance the performance of supercapacitors.

ENERGY & FUELS (2021)

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Article Green & Sustainable Science & Technology

Engineered hierarchical porous carbons for supercapacitor applications through chemical pretreatment and activation of biomass precursors

Gunes A. Yakaboylu et al.

Summary: The study examined the impact of chemical pretreatment time on the activated carbons derived from Miscanthus grass biomass. By controlling the pretreatment duration, the microstructure, chemistry, and active functional groups were adjusted, leading to improved electrochemical performance of the activated carbons. The optimal KOH pretreatment resulted in high specific capacitance, cycling stability, specific energy, and specific power, highlighting the importance of pore volume, cellulose content, C/O ratio, and surface chemistry on the electrochemical performance.

RENEWABLE ENERGY (2021)

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Article Chemistry, Physical

High-density oxygen-enriched graphene hydrogels for symmetric supercapacitors with ultrahigh gravimetric and volumetric performance

Shan Fan et al.

Summary: A high-density oxygen-enriched graphene hydrogel (HOGH) was successfully synthesized using a one-step hydrothermal method with high concentration graphene oxide solution and trometamol. The HOGH exhibited a dense 3D network structure, moderate specific surface areas, and heteroatomic functional groups, leading to high performance in terms of specific capacitance, energy density, rate performance, and cycling stability, making it a promising material for compact energy storage devices.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

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Article Chemistry, Physical

Biomass waste-derived mesopore-dominant porous carbon for high-efficiency capacitive energy storage

Jie Yang et al.

Summary: In this study, mesopore-dominant porous carbon was fabricated from poplar catkin bio-wastes using a facile and mild one-pot strategy, with optimized fabrication parameters leading to superior capacitive energy storage behavior. The carbon material exhibited high specific capacitance, energy density, power density, and cycling stability, making it a promising candidate for advanced electric energy storage devices.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

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Article Chemistry, Analytical

KMnO4-assisted synthesis of oxygen-containing porous graphene with high gravimetric and volumetric performances for supercapacitor

Hongxue Zhang et al.

Summary: A new and facile strategy was reported to synthesize rich oxygen-containing porous graphene, which exhibited excellent electrochemical performance with high capacitance, energy density, and stability, showing promising potential for supercapacitor applications.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY (2021)

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Article Chemistry, Physical

Enhanced surface and electrochemical properties of nitrogen-doped reduced graphene oxide by violet laser treatment for high charge storage and lower self-discharge supercapacitors

Sarawudh Nathabumroong et al.

Summary: The study found that the performance of nitrogen-doped reduced graphene oxide (N-rGO) electrodes for supercapacitors can be further enhanced with violet laser treatment, leading to a high specific capacitance of 214 F g(-1) and 94% capacitance retention after 10,000 cycles. The laser treatment increased the number of exfoliated graphene oxide sheets and reduced oxygen/nitrogen-containing functional groups, resulting in improved charge storage ability, electrode stability, and self-discharge rate.

JOURNAL OF POWER SOURCES (2021)

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Article Chemistry, Physical

Surface-engineered flexible fibrous supercapacitor electrode for improved electrochemical performance

Jaeyeon Lee et al.

Summary: Flexible smart fibrous supercapacitors show promising energy storage performance and mechanical flexibility for electronic textiles, with superior energy density and power density, attributed to surface-engineered carbon fibers and gel-electrolyte for ion transfer.

APPLIED SURFACE SCIENCE (2021)

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Article Materials Science, Multidisciplinary

Low temperature plasma treatment of rice husk derived hybrid silica/carbon biochar using different gas sources

Zaheeruddin Mohammed et al.

Summary: Hybrid silica/carbon particles synthesized from rice husk were subjected to low temperature plasma treatments with different gas sources, resulting in effective alteration of surface properties and increased nanoporous structure in oxygen plasma treatments.

MATERIALS LETTERS (2021)

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Article Multidisciplinary Sciences

Integrated hybrid architecture of metal and biochar for high performance asymmetric supercapacitors

Omid Norouzi et al.

Summary: Two state-of-the-art electrodes were synthesized and used in both symmetric and asymmetric supercapacitors, demonstrating different maximum specific capacitance values. The introduction of cobalt oxides in different ways successfully improved the cycle life of the supercapacitor devices. The use of unbuffered aqueous electrolyte and unique morphological structure in this study may promote the commercialization of advanced energy storage devices.

SCIENTIFIC REPORTS (2021)

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Article Chemistry, Physical

Protonic acid catalysis to generate fast electronic transport channels in O-functionalized carbon textile with enhanced energy storage capability

Lei Wang et al.

Summary: A novel two-step protonic acid catalysis method has been developed to engineer fast electronic transport channels in oxygen-functionalized carbon materials, enabling high charge storage capability and rapid charge transfer; the resulting functionalized carbon textile features high oxygen content and electrical conductivity, maintaining the integrity of the carbon network while embedding abundant active oxygen functional groups.

NANO ENERGY (2021)

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Review Materials Science, Multidisciplinary

Review on porous carbon materials engineered by ZnO templates: Design, synthesis and capacitance performance

Bing Yan et al.

Summary: Supercapacitors are a cost-effective avenue for energy storage with excellent stability, rate performance, and power densities. Electrode materials, especially porous carbon materials synthesized with nano-ZnO templates, play a crucial role in enhancing capacitance performance. The use of ZnO templates not only facilitates the preparation of porous carbon materials, but also improves the structure-directing role for energy storage applications.

MATERIALS & DESIGN (2021)

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Article Materials Science, Multidisciplinary

Pomelo peel-derived lamellar carbon with surface oxygen functional groups for high-performance supercapacitors

Zhiyu Wang et al.

Summary: Biomass-derived carbons, particularly the two-dimensional carbon derived from pomelo peel in this study, show great promise as electrode materials for supercapacitors due to their large surface area and abundant surface oxygen functional groups. This type of carbon delivers high capacitance in aqueous electrolytes and high energy density in ionic liquids, with good cycling stability. The excellent performance makes it a potential candidate for supercapacitor electrodes.

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING (2021)

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Effect of ambient plasma treatment on single-walled carbon nanotubes-based epoxy/fabrics for improving fracture toughness and electromagnetic shielding effectiveness

Yoon-Sub Kim et al.

Summary: The study enhanced the adhesion between carbon nanotubes and the epoxy matrix through ambient plasma treatment, resulting in high conductivity and excellent EMI shielding effectiveness.

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING (2021)

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Article Chemistry, Multidisciplinary

Effects of Oxygenated Acids on Graphene Oxide: The Source of Oxygen-Containing Functional Group

Xinghua Zhu et al.

Summary: Graphene oxide, an important member of the graphene family, has a wide range of applications and its preparation using chemical methods, especially the liquid phase method, is common. However, the complex solution environment presents challenges for large-scale industrial synthesis. Understanding the structure, especially the source of oxygen-containing functional groups, is crucial for industrial applications. In this study, the contribution of various oxygenated acids to the oxygen-containing functional groups in Hummers' method was investigated using first principles, revealing permanganic acid as a potential source. Stone-Wales defect also impacts the formation of oxygen-containing functional groups, albeit less than the solvation effect.

FRONTIERS IN CHEMISTRY (2021)

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Article Chemistry, Multidisciplinary

Surface Engineering of Carbon via Coupled Porosity Tuning and Heteroatom-Doping for High-Performance Flexible Fibrous Supercapacitors

Young-Geun Lee et al.

Summary: The study focused on surface engineering of flexible fibrous supercapacitors using nitrogen and fluorine codoped mesoporous carbon fibers, resulting in improved electrochemical performance with high specific capacitance and ultrafast cycling stability. The supercapacitor demonstrated good mechanical properties and safety, showcasing its potential for application in wearable electronic textiles.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Physical

Synergistically optimizing electronic structure and reducing ions transport resistance by oxygen functional groups and defects in carbon for superior sodium capture and potassium storage capability

Yanjun Gao et al.

Summary: The synergy of oxygen functional groups and intrinsic defects can enhance potassium storage and sodium capture efficiency. Modified carbon materials show significant improvements in K+ transmission capability and Na+ storage capacity through this synergistic effect.

CARBON (2021)

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Article Electrochemistry

Relationships between polypyrrole synthesis conditions, its morphology and electronic structure with supercapacitor properties measured in electrolytes with different ions and pH values

A. . A. . Iurchenkova et al.

Summary: This study focuses on exploring the impact of different synthetic media on the atomic and electronic structure of polypyrrole, as well as its electrochemical properties in various electrolytes. It demonstrates that the properties of polypyrrole are closely related to the synthetic medium, nitrogen species, and oxygen-containing functional groups in the structure of the polymer. The specific capacitance of polypyrrole produced in acetonitrile is stable and reaches approximately 385 F g(-1) in 1M KCl aqueous solution over 10,000 cycles.

ELECTROCHIMICA ACTA (2021)

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Article Energy & Fuels

High-performance activated carbons for supercapacitor: Effects of porous structures, heteroatom doping, and morphology

Xinyu Cai et al.

Summary: In this study, a series of activated carbons (ACs) with different morphologies, porous structures, and oxygen contents were prepared from glucose using hydrothermal synthesis (HTS) and activation methods. The ACs exhibited large surface areas, varying oxygen contents, and different electrochemical performances in various electrolytes. Oxygen-enriched functional groups had limited contribution to energy storage in neutral electrolytes, but profoundly increased energy storage in strong acidic and alkaline electrolytes.

INTERNATIONAL JOURNAL OF ENERGY RESEARCH (2021)

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Article Physics, Condensed Matter

Insights into the effect of hydroxyl-, epoxy-, and carboxyl-pores on the desolvation of K+ with water as a solvent: a first-principles study

Shaobin Yang et al.

Summary: The study demonstrates the significant influence of oxygen-containing functional groups on the performance of porous carbon, with the adjustment of these groups potentially leading to increased capacitance in supercapacitors. The simulation results provide valuable insights into the desolvation behavior of hydrated potassium ions in various types of functionalized pores, showing changes in desolvated sizes and interactions with oxygen-containing groups. This research highlights the importance of molecular design in improving the capacity of supercapacitors by modifying the pore walls of porous carbon materials with specific functional groups.

JOURNAL OF PHYSICS-CONDENSED MATTER (2021)

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Article Chemistry, Applied

Facile synthesis of chitosan derived heteroatoms-doped hierarchical porous carbon for supercapacitors

Kai Chen et al.

Summary: This study reported a facile approach to prepare nitrogen-doped carbon material with tunable pore structure, showing excellent electrochemical performance. By adjusting the calcination temperature and active agents, the morphology and pore structure of the material can be effectively controlled. The final product exhibited outstanding performance in terms of specific capacitance and cycle stability.

MICROPOROUS AND MESOPOROUS MATERIALS (2021)

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Article Biochemistry & Molecular Biology

Carbon Nanotube Fibers Decorated with MnO2 for Wire-Shaped Supercapacitor

Luman Zhang et al.

Summary: The study explored the incorporation of MnO2 nanoflakes onto dry-spun CNT fibers, resulting in high specific capacitance and improved electrochemical performance. The wire-shaped supercapacitor composed of CNT-MnO2 fiber electrodes demonstrated high energy density and cycling performance, showing potential for flexible and wearable energy storage devices.

MOLECULES (2021)

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Article Electrochemistry

Introducing Electrochemically Active Oxygen Species to Boost the Pseudocapacitance of Carbon-based Supercapacitor

You Ren Hu et al.

Summary: By oxidizing carbon electrodes in 1 M H2SO4 electrolyte, this study successfully introduced pseudocapacitance to address the low energy density issue in carbon-based supercapacitors. Manipulating the potential window and sweep rate enhanced oxygen content and specific capacitance, leading to improved rate performance and cycling stability of the oxidized AC electrodes.

CHEMELECTROCHEM (2021)

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Review Chemistry, Multidisciplinary

Advance in Using Plasma Technology for Modification or Fabrication of Carbon-Based Materials and Their Applications in Environmental, Material, and Energy Fields

Xin Sun et al.

Summary: The article provides a comprehensive review of plasma-treated carbon-based materials and their applications in environmental, materials, and energy fields. Plasma-treated CBMs have unique features such as higher adsorption capacity, enhanced wettability, and improved electrocatalytic activity, leading to significant enhancements in recent years in various fields. Possible reaction routes for the generation of functional groups on CBMs are summarized, with a future outlook suggesting precise control of plasmas for synthesizing or modifying CBMs at the atomic level.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

A High-Performance, Tailorable, Wearable, and Foldable Solid-State Supercapacitor Enabled by Arranging Pseudocapacitive Groups and MXene Flakes on Textile Electrode Surface

Yuanming Wang et al.

Summary: A high-performance, tailorable and foldable solid-state asymmetric supercapacitor was developed through regulating oxidization time and MXene loading, fundamentally avoiding the risk of active materials detaching during mechanical deformation. This device achieved extended voltage window, high energy density, and capacitance retention after cycles, showing potential practical application.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Nanoscience & Nanotechnology

Plasma-Assisted Surface Modification on the Electrode Interface for Flexible Fiber-Shaped Zn-Polyaniline Batteries

Hyunjin Yu et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

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Article Chemistry, Physical

Manganous nitrate-assisted potassium hydroxide activation of humic acid to prepare oxygen-rich hierarchical porous carbon as high-performance supercapacitor electrodes

Guangxu Huang et al.

JOURNAL OF POWER SOURCES (2020)

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Article Electrochemistry

Low temperature and highly efficient oxygen/sulfur dual-modification of nanoporous carbon under hydrothermal conditions for supercapacitor application

Wenmei Song et al.

JOURNAL OF SOLID STATE ELECTROCHEMISTRY (2020)

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Article Physics, Applied

Study on atmospheric air glow discharge plasma generation and surface modification of carbon fiber fabric

Luxiang Zhao et al.

PLASMA PROCESSES AND POLYMERS (2020)

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Proceedings Paper Physics, Applied

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Plasma-tuneable oxygen functionalization of vertical graphenes enhance electrochemical capacitor performance

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Proceedings Paper Multidisciplinary Sciences

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Amorphous Carbon Nanofibers and Their Activated Carbon Nanofibers as Supercapacitor Electrodes

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Carbon-based materials as supercapacitor electrodes

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CARBON (2008)

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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2007)

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Characterization of surface oxygen complexes on carbon nanofibers by TPD, XPS and FT-IR

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Anomalous increase in carbon capacitance at pore sizes less than 1 nanometer

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Modification of the oxygen-containing functional group on activated carbon fiber in electrodes of an electric double-layer capacitor

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JOURNAL OF POWER SOURCES (2006)

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A high-performance carbon for supercapacitors obtained by carbonization of a seaweed biopolymer

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On the specific double-layer capacitance of activated carbons, in relation to their structural and chemical properties

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Capacitance behavior of activated carbon fibers with oxygen-plasma treatment

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Surface modification of carbon nanofibres in low temperature plasmas

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DIAMOND AND RELATED MATERIALS (2004)

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Article Electrochemistry

Characterization of vulcan electrochemically oxidized under simulated PEM fuel cell conditions

KH Kangasniemi et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2004)

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Article Electrochemistry

Nitric acid modification of activated carbon electrodes for improvement of electrochemical capacitance

YR Nian et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2002)

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Article Chemistry, Physical

Surface oxides on carbon and their analysis: a critical assessment

HP Boehm

CARBON (2002)

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Review Chemistry, Physical

Carbon materials for the electrochemical storage of energy in capacitors

E Frackowiak et al.

CARBON (2001)

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