极板厚度及密度对MH/Ni电池的影响  

Influence of electrode thickness and density on Ni/MH batteries

作　　者：王丹[1] 刘建华[1] 刘圣迁[1] 何献文[1] 杨建锋[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《电池》2004年第5期355-356,共2页Battery Bimonthly

基　　金：天津市自然科学基金项目(013607011);天津市科委攻关项目(973103711)

摘　　要：从放电过程动力学及多孔电极的结构特性方面,研究和分析了极板厚度及压实密度对MH/Ni电池电化学性能的影响。适当压薄极板,可降低充电电压,减小浓度极化及电化学极化,加快放电过程的反应速度,提高放电电位,增加放电容量;适当减小压实密度,可降低充电电压,提高充电效率,增加放电容量。实验结果表明:对于SC型MH/Ni电池,当镍电极厚度为0 61～0 62mm、压实密度为3 2g/cm3时,电化学性能最好。The influences of nickel electrode thickness and packing density on electrochemical performance were studied and analyzed by kinetics of discharge process and structure of porous nickel electrode. Decreasing electrode thickness could decrease charge voltage, concentration polarization and electrochemical polarization, improve the reaction rate of discharge process, increase the discharge voltage and capacity.Decreasing electrode packing density could decrease charge voltage, improve charge efficiency and increase discharge capacity. The results showed that for SC size Ni/MH batteries, when nickel electrode thickness was 0.61～0.62 mm and packing density was 3.2 g/cm^3, the electrochemical performance was the best.

关 键 词：MH/NI电池 极板 放电过程 放电容量 充电电压 电化学性能 充电效率 板厚 压实密度 厚度 

分 类 号：TM912.2[电气工程—电力电子与电力传动]