期刊
ENERGY TECHNOLOGY
卷 8, 期 5, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.202000050
关键词
carbon fibers; catalytic graphitization; neutral electrolytes; supercapacitors
资金
- Natural Science Foundation of China [NSFC 61604089, 21576158]
- Natural Science Foundation of Shandong Province [ZR2019MA071, ZR2017JL014]
Large accessible surface area, facile pore engineering, and high electrical conductivity are highly desirable properties of efficient electrode materials. Herein, porous carbon fibers with a graphitic carbon skeleton and amorphous carbon body are successfully synthesized from directly carbonized polyacrylonitrile (PAN)/FeCl3 electrospun fibers via in situ catalytic graphitization and subsequent chemical activation. Due to the graphitic carbon skeleton, which facilitates fast electron transfer, and porous carbon body, which gives a large specific surface area for charge accumulation and fast ion diffusion, optimal porous graphitic carbon fibers are developed that exhibit a fast-charging electrochemical performance with a capacitance of 165 F g(-1) at high current densities of 300 A g(-1) in an alkaline electrolyte. These findings can prove to be beneficial for realizing a supercapacitor with rapid charging and discharging ability at high current densities.
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