Effects of surface modification on electrochemical performance of MnO_2  

作　　者：刘立清 王建明 范玉凯 王国光 张鉴清 

机构地区：[1]Depart ment of Chemistry ,Zhejiang University

出　　处：《中国有色金属学会会刊：英文版》2005年第4期944-948,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project (59902004) supported by the National Natural Science Foundation of China

摘　　要：The MnO2 samples coated with Ca（OH）2 were prepared by a liquid-phase surface treatment method. The physical properties of the samples were examined by SEM, EDAX and chemical analysis, and their electrochemical performances were investigated by means of galvanostatic charge-discharge, cyclic voltammetry and electrochemical impedance spectroscopy （EIS）. The SEM results show that the samples coated with Ca（OH）2 display a porous surface structure. The electrochemical experiments indicate that the surface modification decreases the polarization of MnO2 electrodes and improves their discharge potentials and discharge capacities.The MnO2 samples coated with Ca（OH）2 were prepared by a liquid-phase surface treatment method. The physical properties of the samples were examined by SEM, EDAX and chemical analysis, and their electrochemical performances were investigated by means of galvanostatic charge-discharge, cyclic voltammetry and electrochemical impedance spectroscopy （EIS）. The SEM results show that the samples coated with Ca（OH）2 display a porous surface structure. The electrochemical experiments indicate that the surface modification decreases the polarization of MnO2 electrodes and improves their discharge potentials and discharge capacities.

关 键 词：MNO2 SEM 电化学 光谱学 化学电源 

分 类 号：TM911[电气工程—电力电子与电力传动]