• 文献标题:   Preparation of MnO2/coal-based graphene composites for supercapacitors
  • 文献类型:   Article
  • 作  者:   ZHANG YT, LI JK, LIU GY, CAI JT, ZHOU AN, QIU JS
  • 作者关键词:   taixi coal, coalbased graphene, electrochemical propertie, nanocomposite
  • 出版物名称:   NEW CARBON MATERIALS
  • ISSN:   1007-8827
  • 通讯作者地址:   Xian Univ Sci Technol
  • 被引频次:   2
  • DOI:  
  • 出版年:   2016

▎ 摘  要

The low-cost production of high performance functional materials based on graphene remains a challenging task. One of the options for tackling this problem is to develop new processes based on cheap starting materials such as coal. Coal-based graphene precursors were prepared from purified Taixi anthracite by catalytic graphitization combined with an improved Hummers method, These were mixed with MnO2 and reduced by a low temperature plasma to make MnO2/coal-based graphene nanocomposites. The composites were studied by FT-IR, XRD, TEM and SEM. Their electrochemical performance was evaluated using cyclic voltammetry and galvanostatic charge/discharge. Results show that MnO2 has been even lydeposited on the graphene surface and the specific capacitance of the composite as an electrode in a supercapacitor is much higher than that of coal-based graphene without MnO2. The highest capacitance is 281.1 F/g, which is 261.2% of the value for coal-based graphene.