储氢合金表面包覆铜对MH-Ni电池性能的影响  

Effects of metal copper coated hydrogen absorbing alloy on self-discharge performance of Ni-MH batteries

作　　者：李晓峰[1] 李加勇[1] 董会超[1] 

机构地区：[1]郑州轻工业学院材料与化工学院,河南省表界面重点实验室,河南郑州450002

出　　处：《电源技术》2009年第3期185-187,共3页Chinese Journal of Power Sources

基　　金：河南省教育厅基金项目(2007530009)

摘　　要：采用化学镀的方法在AB5型储氢合金表面包覆一层金属铜。循环伏安测试表明,该金属铜层能够阻碍H原子在合金中的扩散,从而在一定程度上抑制MH电极的析氢过程。但由于金属铜在密封电池中发生氧化-重沉积,MH-Ni电池的自放电性能并没有改善。Electroless metal copper coating was introduced on the surface of AB5 hydrogen absorbing alloy in this paper. The results of cyclic voltammetry tests indicate that the diffusion of H atom in the alloy can be blocked by the Cu layer, thus results in a certain extent inhibition of H2 separation from MH electrode. But as oxidation-redeposition of metal copper could happen in the sealed nickel-metal-hydride battery, the self-discharge performance of the battery could not be improved.

关 键 词：MH-NI电池 自放电 MH电极 表面包覆 金属铜 

分 类 号：TM912.2[电气工程—电力电子与电力传动]