• 文献标题:   Construction of 3D polypyrrole/CoS/graphene composite electrode with enhanced pseudocapacitive performance
  • 文献类型:   Article
  • 作  者:   ZHANG Y, ZHANG JQ, WAN L, MA YH, LIANG TX, LI XC, KONG LB
  • 作者关键词:   pseudocapacitor, cobalt sulfide, graphene, polypyrrole
  • 出版物名称:   IONICS
  • ISSN:   0947-7047 EI 1862-0760
  • 通讯作者地址:   Lanzhou Univ Technol
  • 被引频次:   0
  • DOI:   10.1007/s11581-017-2412-3
  • 出版年:   2018

▎ 摘  要

Herein, 3D graphene/nickel foam (GE/NF) composite matrix was successfully fabricated by using NF as template through a self-catalytic thermal chemical vapor deposition process. By using the prepared GE/NF as substrate, CoS nanosheets were deposited via a facial one-step electrochemical deposition method. Owing to the advantage of GE in boosting the electrical contact between the electroactive host material and current collector, the as-prepared 3D CoS/GE/NF electrode demonstrated a superior capacitance value of 2308 F g(-1) at 1 A g(-1) and a high rate capability of 70.49% at 20 A g(-1). After depositing the polypyrrole (PPY) film on 3D CoS/GE/NF electrode, the electrochemical performance of CoS was further greatly improved and delivered an extremely high capacitance value of 3450 F g(-1) at 1 A g(-1), with good rate capability (62.61% at 20 A g(-1)) and improved cycling stability. The enhanced electrochemical performance of PPY/CoS/GE/NF electrode is closely related to the advantage of PPY film in increasing the electrical conductivity and reinforcing the integrity of electrode.