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POROUS GRAPHENE-MANGANESE DIOXIDE NANOWIRES COMPOSITE FILM FOR HIGH VOLUMETRIC PERFORMANCE SUPERCAPACITORS

Mingxuan HanHao WangDi YuLili JiangYu Zhang

Jilin Institute of Chemical Technology

摘要:We report a novel strategy to prepare densely packed porous graphene and MnO2 nanowires composite film(PGNs-MnO2 NWs) through graphene etching process, hydrothermal method and subsequent vacuum-assisted filtration method. The ion diffusion ability of the PGNs-MnO2 NWs film is greatly enhanced due to the contribution of cross-plane diffusion from porous graphene and in-plane diffusion from MnO2 nanowires-graphene sandwiched structure. Based on its high surface area, fast ion diffusion and high film density, the PGNs-MnO2 NWs film electrode exhibits high volumetric specific capacitance of 206 F cm-3 at 5 mV s-1 in 1 M Na2SO4 aqueous solution. The capacitance remains 99.5% after 2000 cycles of the cyclic voltammetry method. The strategy provides a facile and effective method to achieve high performance electrode materials for supercapacitor.
会议名称:

2018年第一届新材料与智能制造国际会议

会议时间:

2018-06-23

会议地点:

中国吉林吉林

  • 专辑:

    工程科技Ⅰ辑; 工程科技Ⅱ辑

  • 专题:

    材料科学; 工业通用技术及设备; 电力工业

  • 分类号:

    TB383.2;TM53

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