摘要
聚吡咯与石墨烯都具有良好的导电性,并易于与其他材料复合.为了改善金属氧化物材料的电化学性能,采用两步法,先合成氧化石墨烯/聚吡咯复合物,利用高锰酸钾与乙二醇在微波下与氧化石墨烯/聚吡咯复合物反应,制备四氧化三锰/聚吡咯/还原氧化石墨(Mn3O4/PPy/r GO)复合材料,利用扫描电镜、傅立叶红外光谱和X射线衍射对Mn3O4/PPy/r GO复合材料的微观形貌及结构进行表征,并通过循环伏安法和计时电位法对其电化学性能进行测试.结果表明,电流密度为0.5 A/g时,Mn3O4/PPy/r GO复合材料的电容达到546 F/g,经过800圈循环伏安测试后的电容保持率为94.8%.表明Mn3O4/PPy/r GO复合材料具有良好的电化学可逆性与电化学稳定性.其优良的电化学性能可能是Mn3O4/PPy/r GO复合材料中三种组分共同作用的结果,可望应用于新型超级电容器.
Polypyrrole and grahene are conducting materials with excellent compatibility with other materials.To improve the electrochemical property of metal oxide materials, manganic manganous oxide / polypyrole /graphene(Mn3O4/ PPy / r GO) ternary nanocomposites were prepared by two-step method. Scanning electron microscopy, Fourier infrared spectrum and X-ray diffraction techniques were carried out to characterize the microstructures and properties of the Mn3O4/ PPy / r GO ternary nanocomposites. Moreover, the electrochemical performance was tested by cyclic voltammetry and chronopotentiometry. The result indicates that the specific capacitance of the ternary nanocomposites reaches 546 F / g at the current density of 5 A / g, which keeps94.8% by 800 cyclic voltammetry tests. It indicates that Mn3O4/ PPy / r GO ternary nanocomposites have good electrochemistry reversibility and recyclable properties. It suggests that the mutual interactions among the components of Mn3O4, PPy and r GO in the nanocomposite results in the electrochemical performance and these ternary nanocomposites could be used as super-capacitors in future.
出处
《武汉工程大学学报》
CAS
2015年第8期45-48,共4页
Journal of Wuhan Institute of Technology
基金
武汉工程大学第六届研究生教育创新基金(CX2014059)
湖北省高等学校2014年省级大学生创新创业训练计划项目(201410490005)
关键词
复合材料
电化学性能
吸附
composite materials
electrochemical property
adsorption
