• 文献标题:   All graphene electrode for high-performance asymmetric supercapacitor
  • 文献类型:   Article
  • 作  者:   SIDDIQUE AH, BUTT R, BOKHARI SW, RAJ DV, ZHOU XF, LIU ZP
  • 作者关键词:   asymmetric supercapacitor, allgraphene electrode system, functionalized graphene, iodinedoped graphene, ultrahigh energy density
  • 出版物名称:   INTERNATIONAL JOURNAL OF ENERGY RESEARCH
  • ISSN:   0363-907X EI 1099-114X
  • 通讯作者地址:   Chinese Acad Sci
  • 被引频次:   4
  • DOI:   10.1002/er.4893 EA NOV 2019
  • 出版年:   2020

▎ 摘  要

"Electrode imbalance" is one of the major issues that hinders the potential performance of asymmetric supercapacitors (ASCs), which arises mainly due to the huge dissimilarities of the electrodes microstructures. Herein, an "all-graphene" electrode system is designed by simple chemo-thermal modification of graphene oxide. Chemically functionalized graphene (FG) cathode and two anodes based on thermally reduced graphene oxide (TrGO) and iodine-doped graphene (IG) prepared via simple synthetic routes, followed by assembling into ASCs. The ASC comprising FG cathode-IG anode delivers phenomenally high energy-power (E-P) density (91 W h kg(-1) and 424.95 W kg(-1)) and a good capacitance retention after 10 000 cycles. This outcome is accredited to the similar chemistry of electrodes resulting in a minimal electrode imbalance. The developed scheme has capacity to be employed as all-graphene hybrid energy storage system outputting enhanced performance and cyclic stability.