MH/Ni电池储存性能的改善及其机理研究  

Improvement and Its Mechanism of Storage Performance of Ni-MH Battery

作　　者：李晓峰[1] 马丽萍[1] 娄豫皖[1] 李峰[1] 夏保佳[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所能源室,上海200050

出　　处：《电化学》2004年第4期425-429,共5页Journal of Electrochemistry

基　　金：国家"86 3"计划 (2 0 0 1AA50 1 53 2 )资助

摘　　要：　应用恒电流充放电法和循环伏安法研究了MH/Ni电池的储存性能.结果表明,储存期间当电池开路电压下降至1.0V以下后,组成正极导电网络的CoOOH将被还原并在随后的充电过程中不能完全复原,导致电池储存性能下降.如于正极中加入镍粉作导电剂,便能在一定程度上减缓这种影响,改善电池的储存性能.The storage performance of nickel-metal-hydride (Ni-MH) battery was studied by using galvanostatic charge-discharge and cyclic voltammetry. The experimental results indicated that CoOOH could not be completely restored after its being thoroughly reduced at lower potential, which might weaken electric conduction network in the positive electrode and result in fading of electrochemical properties of Ni-MH battery. Addition of nickel powder as a conductive agent into the positive electrode was beneficial to the capacity recovery after storage.

关 键 词：储存性能 MH/NI电池 正极 充电过程 开路电压 充放电 电网络 导电剂 恒电流 储存期 

分 类 号：TM912.2[电气工程—电力电子与电力传动]