阳极电沉积Mn-Mo氧化物/石墨烯复合材料及其电化学性能

Preparation and Electrochemical Properties of Mn-Mo Oxide/Graphene Composites by Anodic Electrodeposition

为了实现MnO，与石墨烯的均匀复合。发挥两者的协同效应，开发低能耗电极，采用阳极电沉积法制备了Mn-Mo氧化物／石墨烯（GR）复合阳极材料，通过场发射扫描电镜（FESEM）、能谱仪（EDS）、交流阻抗谱（EIS）及循环伏安（cv）等试验方法研究了Mn-Mo氧化物／石墨烯复合材料的微观结构与电化学性能。结果表明：阳极电沉积法成功克服了复合材料中石墨烯的团聚问题．获得了具有网孔状纳米结构的Mn-Mo氧化物／石墨烯复合材料；随着沉积电流密度的增大，镀层中石墨烯的含量增大，纳米结构更细小；纳米石墨烯的均匀复合大大提高了Mn-Mo氧化物的导电性能及电化学性能，当电流密度为0．08A／cm2时，复合氧化物的质量比电容为330F／g，获得了较高的电容特性。

In order to realize the uniform combination of MnO2 and graphene, and to exert their synergistic effect for the development of lowenergy electrode, Mn-Mo oxide/graphene （GR） composite anode material was prepared by anodic electrodeposition method. FESEM, EDS, EIS and CV were used to study the microstructure and electrochemical properties of Mn-Mo oxide/graphene composites. Results showed that the anode electrodeposition method successfully overcame the agglomeration of graphene in the composite material and the Mn-Mo oxide/graphene composite material with mesh-like nanostructure was obtained. With the increase of deposition current density, the content of graphene in the coating would increase and the nanostructure would be finer. Uniform composite of nano graphene and Mn-Mo oxide greatly improved electroconductivity and electrochemical properties of the Mn-Mo oxide. When the current density was 0.08 A/cm2, the mass ratio capacitance of composite oxides was 330 F/g, presenting a higher capacitance property.