MH-Ni电池失效的电化学分析  

Electrochemical analysis of failed Ni-MH batteries

作　　者：袁俊[1] 祁建琴[2] 涂江平[3] 冯海[2] 陈长聘[3] 陈卫祥[2] 

机构地区：[1]浙江大学国家硅材料重点实验室,浙江杭州310027 [2]浙江大学化学系,浙江杭州310027 [3]浙江大学材料科学与工程系,浙江杭州310027

出　　处：《电源技术》2001年第4期279-282,共4页Chinese Journal of Power Sources

基　　金：国家"8 63"计划资助项目 (863 71 5 0 0 4 0 0 60 )

摘　　要：通过对失效MH Ni电池的解剖 ,用电化学方法研究分析了贮氢合金表面处理对充放电循环寿命终止时MH Ni电池负极的充放电性能和极化性能的影响。负极充放电曲线表明未处理贮氢合金电极的表面已严重氧化 ,其极化电阻大约是处理贮氢合金电极的 3～ 4倍。而经表面处理的贮氢合金电极仍具有良好的充放电性能和小的极化电阻。The failed Ni MH batteries were disassembled at the end of their cycle life. The effects of surface treatment for hydrogen storage alloy on the charge/discharge property and the polarization characteristic of the negative electrodes in failed batteries were investigated by means of electrochemical method. The charge/discharge curves of the negative electrode indicated that the surface of the untreated hydrogen storage alloy electrode was seriously oxidized and its polarization resistance was as 3-4 times larger than that of the treated alloy electrode, while the treated alloy electrode remained good electrochemical properties. The results show that the surface treatment inhibited the oxidization of the hydrogen storage alloy during charge/discharge cycles.

关 键 词：MH-NI电池 贮氢合金 电化学 失效 蓄电池 

分 类 号：TM912.2[电气工程—电力电子与电力传动]