Significantly Increased Specific Discharge Capacitance at Carbon Fibers Created via Architected Ultramicropores

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(29), P. 20291 - 20299

Published: July 16, 2024

Carbon is commonly used as an electrode material for supercapacitors operating on electrical double-layer energy storage mechanism. However, the low specific capacitance limits its application. Increasing surface area by far most common expansion method, and surprisingly, they are not always positively correlated. The overmuch will show characteristics of nanoconfinement, potential synergistic enhancement mechanism various key parameters still controversial. In this work, carbon fiber electrodes with different ultramicropore structures were designed in order to improve utilization rate discharge capacitance. It has been found that when entrance's too small, it lead decrease external charge pore transport channel, then, selectivity opposite ions decrease. numerical simulation based Poisson Nernst-Planck equations also indicates have difficulty diffusing into micropores their entrance decreases. Surface properties within nanocontainment space become critical factors influencing ion adsorption. increased from 3 1430 mF cm

Language: Английский

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Molten salt-mediated hierarchical porous carbon derived from biomass waste for high-performance capacitive storage

Journal of Power Sources, Journal Year: 2024, Volume and Issue: 618, P. 235216 - 235216

Published: Aug. 11, 2024

Language: Английский

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Revealing Low-Voltage Li/Na/K storage in hard carbon Anodes: Insertion or Pore-Filling under debate

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156080 - 156080

Published: Sept. 1, 2024

Language: Английский

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Engineering potassium-ion battery anodes with ultra-high structural stability and their potassium storage mechanism

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 505, P. 159921 - 159921

Published: Jan. 25, 2025

Language: Английский

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Nitrogen Doping Induces Carbon Micro-defect to Improve Potassium Storage Properties

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2025, Volume and Issue: unknown, P. 136485 - 136485

Published: March 1, 2025

Language: Английский

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Advances in functional applications of biomass-derived carbon composites for phase change materials

Microstructures, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

The existence of biomass materials as the only renewable carbon source is an extremely important resource in realm modern energy and science. Biomass-derived composites (BDCCs), with their unique advantages applications, such wide sources, low cost, high content tunable structure, have promoted progress innovation several technological fields played indispensable part mitigating environmental pollution promoting sustainable development storage conversion applications. Phase change (PCMs), which possess latent heat release properties, been widely applied field utilization. Nonetheless, obstacles limit application PCMs, including occurrence leakage during operation relatively thermal conductivity. porous structure BDCCs enhances conductivity PCMs effectively prevents leakage. Consequently, there has growing interest among researchers BDCCs/PCMs. Nevertheless, a paucity literature providing comprehensive detailed introduction to applications PCMs. On this basis, review will provide overview feedstock classes synthesis methods based on recent research advances, followed by investigation potential functional BDCCs. Ultimately, paper provides targeted summary challenging opportunities current state emerging needs, constructive references for future efficient utilization

Language: Английский

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Unraveling HCPs-derived porous carbon: Synthesis, pore formation and rapid potassium-ion storage

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161615 - 161615

Published: March 1, 2025

Language: Английский

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Cascade Hydrogen Peroxide Reduction Reaction Endows Cu‐Fe Dual‐Atom Catalyst with Durable Oxygen Reduction Performance

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Abstract Durable problems caused by the attack from free radicals are considered as Achilles’ heel in practical applications for oxygen reduction reaction (ORR) acidic conditions. Herein, a ligand‐bridging strategy is proposed to design Cu─Fe dual‐atom catalyst (CuFeDAC‐NC) relieve undesirable degradation radicals. Comprehensive investigations and theoretical calculations verify that byproduct of hydrogen peroxide can be effectively eliminated at neighboring Cu sites through cascade catalytic process, formation oxidative suppressed, leading enhanced durability. Meanwhile, synergistic effect between site Fe results superior ORR performance. CuFeDAC‐NC delivers half‐wave potential ( E 1/2 ) 0.811 V 0.1 M HClO 4 electrolyte exhibits excellent durability with small loss 12 mV after 10 000 cycles Fe─NC (34 mV). This work not only provides new perspective get insight into mechanisms but also opens an avenue catalysts

Language: Английский

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Self-Propagating Fabrication of a 3D Graphite@rGO Film Anode for High-performance Potassium-Ion Batteries

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(32), P. 42118 - 42127

Published: Aug. 2, 2024

Graphite, with abundant resources and low cost, is regarded as a promising anode material for potassium-ion batteries (PIBs). However, because of the large size potassium ions, intercalation/deintercalation between interlayers graphite results in its huge volume expansion, leading to poor cycling stability rate performance. Herein, self-propagating reduction strategy adopted fabricate flexible, self-supporting 3D porous graphite@reduced graphene oxide (3D-G@rGO) composite film PIBs. The network can not only effectively mitigate expansion but also provide numerous active sites storage well allow electrolyte penetration rapid ion migration. Therefore, compared pristine anode, flexible 3D-G@rGO electrode exhibits greatly improved K-storage performance reversible capacity 452.8 mAh g

Language: Английский

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Silicon-doped multilayer graphene as anode material for secondary batteries

Applied Surface Science, Journal Year: 2024, Volume and Issue: 681, P. 161483 - 161483

Published: Oct. 10, 2024

Language: Английский

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