Activated Porous Carbon Nanofibers for High-Performance Supercapacitors

被引:10
|
作者
Islam, Moyinul [1 ]
Lu, Xing [1 ]
机构
[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mold Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China
来源
基金
中国国家自然科学基金;
关键词
Activation; Carbon nanofibers; Supercapacitors; HIGH-SURFACE-AREA; N-DOPED CARBON; ELECTRODES; GRAPHENE; FILMS; FABRICATION; COMPOSITES; NETWORK; FIBERS; GROWTH;
D O I
10.20964/2019.03.01
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The pursuit of high-capacitance carbon materials is urgently needed for supercapacitors, which are among the most promising energy storage devices. Herein, we developed an effective KOH-activation method to improve the porous structures of electrospun carbon nanofibers for high-performance supercapacitors. In detail, polyacrylonitrile (PAN) and polymethyl methacrylate (PMMA) polymer blend solutions were electrospun to fabricate carbon nanofibers for pure PAN and, PAN: PMMA (80:20). PMMA was used as a sacrificial polymer to create pores. Furthermore, the KOH-activation method was applied to improve the pores of PAN:PMMA (80:20) at 600 degrees C. The obtained KOH-activated PAN: PMMA (80:20) exhibits an excellent specific capacitance of 440 F g(-1) at a current density of 0.25 A g(-1) and a superior cycling stability of 95% after 5000 cycles. The present research contributes to the implementation of KOH-activation that results in excellent performance compared to carbon nanofibers reported thus far. Our work demonstrates that KOH-activation is an outstanding method to promote the performance of supercapacitors. Therefore, such a strategy could be a promising method to fabricate high-performance supercapacitors.
引用
收藏
页码:3856 / 3870
页数:15
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