MH-Ni蓄电池在放电态条件下的储存性能  

Storage performance of Ni-MH battery at state of discharge

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和信息技术研究所,上海200050

出　　处：《电源技术》2004年第6期364-368,共5页Chinese Journal of Power Sources

摘　　要：研究了金属氢化物-镍(MH-Ni)蓄电池在放电态开路条件下60℃环境中的储存性能,并与烧结式和涂膏式镉-镍蓄电池进行了对比.储存25 d后,MH-Ni蓄电池开路电压下降到1.0 v以下并在0.64～7 v之间出现-个平台;同时,电池放电容量出现不可逆衰减.0.2 c充放电循环、短路储存和循环伏安等试验证明,低电位下CoOOH的还原反应引起涂膏式氢氧化镍正极导电网络的破坏,从而导致MH-Ni电池容量的不可逆衰减.烧结式Cd-Ni蓄电池良好的储存性能可归结于烧结镍基体本身稳定的导电网络.The electrochemical performance of nickel-metal-hydride batteries was comparatively investigated before and after storage in atmosphere at 60 ℃ under fully discharged and open-circuit conditions, along with sintered and pasted nickel-cadmium batteries. After storage 25 days, the open voltage of MH-Ni batteries fell below 1.0 V, followed by a voltage plateau between 0.6—0.7 V and capacity fading occurred. The experimental results of charge-discharge cycling, storage under short-circuit condition and cyclic voltammetry indicate that the reduction of CoOOH is a main cause of the irreversible capacity fading of Ni-MH batteries. On the contrary, sintered Ni-Cd batteries show excellent storage performance because of their stable electric network.

关 键 词：MH—Ni蓄电池 储存性能 放电容量 

分 类 号：TM912.2[电气工程—电力电子与电力传动]