石墨烯/镍掺杂二氧化锰复合材料的电化学性能  

Electrochemical performance of graphene / Ni-doping manganese dioxide composite

作　　者：刘永欣[1] 唐佳勇 王诗迪[2] 马晓华[2] 

机构地区：[1]国家知识产权局专利局专利审查协作北京中心,北京100083 [2]复旦大学材料科学系,上海200433

出　　处：《电池》2014年第5期268-270,共3页Battery Bimonthly

摘　　要：通过液相共沉淀法制备了石墨烯/镍掺杂二氧化锰（MnO2）复合材料。用XRD、SEM分析复合材料的微观结构和表面形貌,用恒流充放电、循环伏安及交流阻抗研究复合材料的电化学性能。镍掺杂的Mn O2为α-MnO2,粒径约为50 nm。复合材料具有良好的电化学性能,在电解液2 mol/L KOH中0.5 A/g、-0.2-0.8 V时的比电容达到319 F/g,循环伏安测试结果表明,电化学可逆性较好。Graphene/Ni-doping manganese dioxide（ MnO2 ）composite was synthesized by a chemical co-precipitation method. The micro structure and surface morphology of the composite were analyzed by XRD, SEM. The electrochemical performance of the com- posite was studied by cyclic voltammetry, galvanostatic charge-discharge and A.C. impedance. The Ni doped MnO2 was α-MnO2 and its particle size was about 50 nm. The composite exhibited fine electrochemical performance, the specific capacitance reached 319 F/g in the electrolyte 2 mol/L KOH with 0. 5 A/g, -0. 2 -0. 8 V. The cyclic vohammetry test results showed that the composite had a fine electrochemical reversibility.

关 键 词：金属氧化物 石墨烯 复合材料 二氧化锰(MnO2) 超级电容器 

分 类 号：TM53[电气工程—电器]