摘要
将氧化石墨(GO)还原为石墨烯(GNS),以高锰酸钾(KMnO_4)和硫酸锰(MnSO_4)为锰源,在石墨烯基体上合成二氧化锰/石墨烯(MnO_2/GNS)复合电极材料。采用扫描电子显微镜(SEM)、X射线衍射(XRD)对材料的微观形貌和晶体结构进行表征;将电极材料制备成复合电极片并组装成对称型超级电容器,采用恒流充放电对其进行电化学性能测试。结果表明,复合电极材料在5A·g^(-1)的电流条件下,比容量达到291.5 F·g^(-1),在循环200次后电容保持率达到95.6%,具有良好的电化学性能。
Graphene(GNS)was synthesized by reduction method with graphite oxide(GO).Manganese dioxide/graphene composite electrode materials was synthesized on graphene substrate with KMnO4and MnSO4as material.The morphologies and crystal structures of the materials were characterized by scanning electron microscopy(SEM)and X-ray diffraction(XRD).The electrode material was prepared into composite electrode and assembled into symmetrical supercapacitor.The electrochemical performance was tested by constant current charging and discharging.The results showed that the specific capacitance of composite electrode material reached291.5F/g under the current of5A/g,and the capacitance retention rate reaches95.6%after200cycles,and had good electrochemical performance.
作者
蔡敏
吴春燕
CAI Min;WU Chunyan(Department of Natural Resources Engineering, Guangxi Modern Polytechnic, Hechi 547000, China)
出处
《化工技术与开发》
CAS
2017年第12期13-15,共3页
Technology & Development of Chemical Industry
基金
2016年度广西高校中青年教师基础能力提升项目(KY2016YB749)
关键词
二氧化锰
石墨烯
复合电极材料
电化学性能
manganese dioxide
grapheme
composite electrode material
electrochemical performance
