Surface Oxygen Engineering Catalytic Pore Tailoring of Coal-Based Needle Coke toward Capacitive Porous Carbon DOI
Dongdong Zhang,

Weijun Ma,

Jie Luo

et al.

Langmuir, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 7, 2024

Coal-based needle coke (CNC) is an ideal carbon precursor for capacitive materials due to its layered graphitic structure and high electrical conductivity. However, the pore-rich engineering structural inheriting of CNC-derived during conventional activation process present challenges. Herein, a surface oxygen catalytic pore tailoring strategy developed manipulate porous structures carbon. This synthesis uses air oxidation form oxygen-rich microregions on CNC surface, which can effectively tear graphite protective shell, accelerate bonding KOH with groups, catalyze etching reaction between potassium compounds atoms. Thanks low temperature 600 °C alkali-to-carbon ratio 1:1, obtained (PC) inherits long-range from CNC, specific areas be adjusted 182.6 855.4 m2 g–1 by adjusting temperature, far more than that PC (7.6 g–1) derived direct activation. The optimized shows capacitance 308.3 F at 0.5 A retention 212.2 20 68.8%. assembled supercapacitor delivers energy density 8.12 Wh kg–1 power 50.0 W ultralong cycle stability 99% Coulombic efficiency 100% after 50,000 cycles. study validates feasibility catalysis in soft enhancing capacitance.

Language: Английский

Interlaminar oxygen bridging assisted alkali activation constructs hydrophilic petroleum coke-based porous carbon for advanced aqueous supercapacitors DOI
Dongdong Zhang,

Weijun Ma,

Jiachuan Wang

et al.

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 117, P. 116236 - 116236

Published: March 14, 2025

Language: Английский

Citations

0
Pyrolysis of loofah sponge into N/O self-doped three-dimensional porous carbon for supercapacitor DOI
Qing Xu,

Pengcheng Cai,

Xuanyuan Ni

et al.

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 109, P. 115180 - 115180

Published: Dec. 31, 2024

Language: Английский

Citations

2
Surface Oxygen Engineering Catalytic Pore Tailoring of Coal-Based Needle Coke toward Capacitive Porous Carbon DOI
Dongdong Zhang,

Weijun Ma,

Jie Luo

et al.

Langmuir, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 7, 2024

Coal-based needle coke (CNC) is an ideal carbon precursor for capacitive materials due to its layered graphitic structure and high electrical conductivity. However, the pore-rich engineering structural inheriting of CNC-derived during conventional activation process present challenges. Herein, a surface oxygen catalytic pore tailoring strategy developed manipulate porous structures carbon. This synthesis uses air oxidation form oxygen-rich microregions on CNC surface, which can effectively tear graphite protective shell, accelerate bonding KOH with groups, catalyze etching reaction between potassium compounds atoms. Thanks low temperature 600 °C alkali-to-carbon ratio 1:1, obtained (PC) inherits long-range from CNC, specific areas be adjusted 182.6 855.4 m2 g–1 by adjusting temperature, far more than that PC (7.6 g–1) derived direct activation. The optimized shows capacitance 308.3 F at 0.5 A retention 212.2 20 68.8%. assembled supercapacitor delivers energy density 8.12 Wh kg–1 power 50.0 W ultralong cycle stability 99% Coulombic efficiency 100% after 50,000 cycles. study validates feasibility catalysis in soft enhancing capacitance.

Language: Английский

Citations

1