期刊
ELECTROCHIMICA ACTA
卷 222, 期 -, 页码 1120-1127出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.11.083
关键词
hollow-porous multilayered; ultrafine carbon fiber; electrospinning; phase separation; carbonization; supercapacitor
资金
- National Natural Science Foundation of China [21206083]
- Project of Liaoning Province of China [LR2014033]
- Open Foundation of Beijing Key Laboratory for Chemical Power Source and Green Catalysis [2016CX02033]
Electrospun fibers of mixed polyacrylonitrile/polyvinyl pyrrolidine (PAN/PVP) sheath and silicone oil core were obtained by coaxial electrospinning. PVP and silicone oil were then removed from the coaxial electrospun fibers via phase separation and carbonization processes, respectively, to make the hollowporous multilayered ultrafine carbon fibers. The relationship between the morphology and electrochemical performance of ultrafine carbon fibers was investigated. Results show that the supercapacitor based on electrode of hollow-porous multilayered ultrafine carbon fibers exhibits high conductivity, fast ion diffusion, high specific capacitance (231.6 F.g(-1)), high charging/discharging efficiency (99.7%), and low internal resistance (0.2 Omega) using tetraethylammonium tetrafluoroborate in acetonitrile as electrolyte. Additionally, this work also demonstrates a great potential in the preparation of carbon nano-materials with graphene-like multilayer structure. (C) 2016 Elsevier Ltd. All rights reserved.
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