MnO_(2)/MWCNTs/GO/PANI复合电极材料的制备及其电化学性能的研究

Preparation and electrochemical properties of MnO_(2)/MWCNTs/GO/PANI electrode materials

采用改进的Hummers法制备氧化石墨烯,并通过原位聚合法将二氧化锰修饰的聚苯胺嫁接到多壁碳纳米管作载体的氧化石墨烯上,制备出新型复合电极材料。使用X射线光电子能谱,扫描电镜及电化学工作站对复合电极材料的形貌、结构进行了研究,通过循环伏安、交流阻抗、循环稳定性测试,表征出复合电极材料的电化学性能,并与未掺杂石墨烯的MnO_(2)/PANI/MWCNTs电极材料进行了对比。结果表明,引入石墨烯的电极材料的比电容有较大的提升,达到了1365 F‧g^(-1)。

The graphene oxide was prepared by the improved Hummers method.Manganese dioxide modified polyaniline was grafted to the graphene oxide supported by MWCNTs by in situ polymerization,and a new composite electrode material was prepared.XPS,SEM and electrochemical workstation were used to study the morphology and structure of the composite electrode materials,The electrochemical properties of the composite electrode materials were characterized by cyclic voltammetry,AC impedance and cyclic stability tests,and compared with MnO_(2)/PANI/MWCNTs electrode materials.The results show that the specific capacitance of the electrode material with graphene is increased to 1365 F·g^(-1)。