• 文献标题:   Scalable microgel spinning of a three-dimensional porous graphene fiber for high-performance flexible supercapacitors
  • 文献类型:   Article
  • 作  者:   MA WJ, LI WF, LI M, MAO QH, PAN ZH, ZHU MF, ZHANG YG
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF MATERIALS CHEMISTRY A
  • ISSN:   2050-7488 EI 2050-7496
  • 通讯作者地址:   Donghua Univ
  • 被引频次:   0
  • DOI:   10.1039/d0ta08937k
  • 出版年:   2020

▎ 摘  要

Graphene fiber-based supercapacitors are emerging as one of the most promising energy-storage devices for wearable electronic devices. However, neat graphene fibers fabricated from liquid crystal spinning, the most commonly used method for preparing graphene fibers, usually have a graphite-like structure due to the pi-pi aggregation, which greatly impedes their practical application in energy storage. Herein, we developed a facile approach for fabricating a N and S co-doped porous graphene fiber by means of microgel spinning using self-assembled 3D GO microgels as a spinning dope followed by thermal reduction. The fabricated fiber with a large specific surface area (312 m(2) g(-1)), appropriate hierarchical pore structures and synergistic effects of N and S co-doping can act as a superior flexible electrode for fiber-shaped supercapacitors in terms of high volumetric capacitance (59.9 F cm(-3) at a current density of 0.1 A cm(-3)), outstanding energy and power density (8.3 mW h cm(-3) at 50.3 mW cm(-3)), exceptional rate capability (44.1 F cm(-3) at a high current density of 1 A cm(-3)) and long cycle stability (96.2% of the initial specific capacitance retention over 10 000 cycles). This cost-effective and simple preparation method paves the way to large-scale fabrication of heteroatom-doped porous graphene fibers and promotes their practical application in wearable devices.