镍表面负载CoMn_2O_4的电化学性能研究

Study on Electrochemical Performance of CoMn_2O_4 Coated on Nickel Surface

采用水热法在泡沫镍表面沉积CoMn2O4,设计一种无粘结剂型电极。利用扫描电镜(SEM),X射线衍射(XRD)、X射线粉末能谱仪(EDS)、循环伏安法(CV)和恒电流充放电(CP)对电极材料进行结构表征和电化学性能测试。结果表明:CoMn2O4纳米片以无定形结构均匀致密地沉积在泡沫镍表面,其放电比电容最高达1.14F/cm2,循环500次后,比电容保持率为65.5%。

Non-adhesive electrode was design through depositing CoMn204 on the surface of nickel foam with hydrothermal method. Scanning electron microscope （SEM）, X ray diffraction （XRD）, energy dispersive spectrometer （EDS）, cyclic voltammetry （CV） and galvanostatic charge-discharge testing （CP） were used for structural characterization of electrode materials and electrochemical performance test. The results show that the CoMn2O4 nanosheets evenly deposit on the surface of nickel foam with amorphous structure. Specific capacitance of discharge is as high as 1. 143 F/cm^2. After 500 times of circulation, retention rate of specific capacitance is 65.5 %.