• 文献标题:   Polypyrrole and polypyrrole@MnO2 nanowires grown on graphene oam for asymmetric supercapacitor
  • 文献类型:   Article
  • 作  者:   DONG S, WANG ZY, WANG JL, YAO Y, LIU HF
  • 作者关键词:   graphene foam, polypyrrole nanowire, polypyrrole@mno2 coreshell nanowire, onestep conversion method, supercapacitor scs
  • 出版物名称:   MATERIALS EXPRESS
  • ISSN:   2158-5849 EI 2158-5857
  • 通讯作者地址:   Changzhou Inst Technol
  • 被引频次:   0
  • DOI:   10.1166/mex.2020.1766
  • 出版年:   2020

▎ 摘  要

The asymmetric supercapacitor with negative electrode by graphene foam loaded Polypyrrole nanowires (PPy NWs/rGOF) and positive electrode by PPy@MnO2 core-shell nanowires on graphene foam (PPy@MnO2 NWs/rGOF) was developed. The negative electrode was further converted into the positive electrode by one-step redox reaction at room temperature. Graphene foam (rGOF) with unique flexibility, large surface area and high electric conductivity can favor in situ growth of polypyrrole nanowires (PPy NWs) as well as improve cycling stability of the resultant negative electrode. PPy NWs served as the ideal template for the formation of MnO2 shell gives rise to the as-prepared positive electrode with fast electron transport and enhanced active material utilization. Owing to the rational design, the assembled asymmetric supercapacitor was able to be repeatedly discharged/charged at 1.6 V, displaying high energy density of 1.04 mWh cm(-3) with improved cycling stability.