期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 3, 页码 4008-4015出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b04396
关键词
Electrochemical capacitors; Binder-free electrode; N-doped porous carbon fiber aerogel; Raw cotton
资金
- National Natural Science Foundation of China [21676070]
- Hebei Natural Science Foundation [B2015208109]
- Hebei Training Program for Talent Project [A201500117]
- Five Platform Open Fund Projects of Hebei University of Science and Technology [2015PT37]
- Hebei One Hundred-Excellent Innovative Talent Program (III) [SLRC2017034]
- Hebei Science and Technology Project [17214304D, 16214510D]
The carbon fiber aerogel with a high surface area, as a promising ideal electrode for electrochemical capacitors (ECs), has attracted tremendous attention because it can offer a fast charge discharge rate and an exceptional rate capability. However, there is still a big challenge to acquire highly porous fiber aerogel with elastic properties and good flexibility. Herein, N-doped porous carbon fiber aerogel (N-CFA) has been successfully fabricated using raw cotton as a fibrous template to obtain shaped aerogels. ZIF-8, in situ fabricated on the surface of cotton, played the role of an active agent and nitrogen source to create a rich porous structure with a certain nitrogen content. Benefiting from the macromonolith morphology with good flexibility, favorable mechanical durability, nitrogen doping, anda high specific surface area, the N-CFA exhibits excellent electrochemical performance with a high capacity of 365 F g(-1) at a current of 0.5 Ag-1 and a remarkable rate capability of 65.8% from 0.5 to 100 A g(-1) as a binder-free electrode in ECs. Additionally, N-CFA also displays a high capacitance retention of 93.6% after 10000 consecutive cycles at 5 A g(-1). The strategy may offer a low-cost and scalable method to produce high-performance N-doped carbon aerogels for electrodes from biomass.
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