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  • 文献标题:   Graphene/MnO2 hybrid nanosheets as high performance electrode materials for supercapacitors
  • 文献类型:   Article
  • 作　　者:   MONDAL AK, WANG B, SU DW, WANG Y, CHEN SQ, ZHANG XG, WANG GX
  • 作者关键词:   composite material, electron microscopy, crystal structure, electrochemical propertie
  • 出版物名称:   MATERIALS CHEMISTRY PHYSICS
  • ISSN:   0254-0584 EI 1879-3312
  • 通讯作者地址:   Univ Technol Sydney
  • 被引频次:   22
  • DOI:   10.1016/j.matchemphys.2013.10.008
  • 出版年:   2014

▎ 摘　　要

Graphene/MnO2 hybrid nanosheets were prepared by incorporating graphene and MnO2 nanosheets in ethylene glycol. Scanning electron microscopy and transmission electron microscopy analyses confirmed nanosheet morphology of the hybrid materials. Graphene/MnO2 hybrid nanosheets with different ratios were investigated as electrode materials for supercapacitors by cyclic voltammetry (CV) and galvanostatic charge-discharge in 1 M Na2SO4 electrolyte. We found that the graphene/MnO2 hybrid nanosheets with a weight ratio of 1:4 (graphene:MnO2) delivered the highest specific capacitance of 320 F g(-1). Graphene/MnO2 hybrid nanosheets also exhibited good capacitance retention on 2000 cycles. (C) 2013 Elsevier B.V. All rights reserved.