贮氢合金电极的循环伏安和交流阻抗研究  

Study on cyclic voltammetry and electrochemical impedance of hydrogen storage alloy electrode

作　　者：陈卫祥[1] 

机构地区：[1]浙江大学化学系,浙江杭州310027

出　　处：《电源技术》2000年第4期200-203,共4页Chinese Journal of Power Sources

基　　金：国家"863"计划资助项目! ( 71 5 0 0 4 0 0 60 )

摘　　要：贮氢合金电极的表面处理是改善其电化学性能的有效方法。通过MH电极的循环伏安和电化学阻抗谱研究了碱性溶液中MH电极表面还原处理对其电化学性能的影响。结果表明MH电极表面还原处理后 ,提高了电极的充电效率 ,改善了电极表面的电化学反应活性。通过对MH电极电化学阻抗谱的分析 ,发现这种处理明显降低了电极表面的电化学反应阻抗。The surface treatment of hydrogen storage alloy electrode is an effective method to improve its electrochemical performances. Effect of the surface treatment on the electrochemical performances of MH electrodes were investigated by means of cyclic voltammetry and electrochemical impedance spectra. The results show that the charge efficiency and electrochemical reaction activity of MH electrodes are improved by the treatment. The electrochemical impedance analysis indicates that the charge transfer impedance on the surface is decreased.

关 键 词：贮氢合金电极 循环伏安 交流阻抗 MH-NI电池 

分 类 号：TM912.203[电气工程—电力电子与电力传动]