不同Co含量Mm(NiCoMnAl)_5贮氢合金的低温放电特性  

The Effects of Different Co Contents on Discharge Properties of the Mm(NiCoMnAl)_5 Hydrogen Storage Alloy at –40℃

作　　者：付春艳[1] 陶明大[1] 陈云贵[1] 吴朝玲[1] 涂铭旌[1] 

机构地区：[1]四川大学,四川成都610065

出　　处：《稀有金属材料与工程》2005年第4期577-580,共4页Rare Metal Materials and Engineering

摘　　要：用电化学方法研究了–40℃条件下Co含量对AB5_型贮氢合金的放电容量、氢化物分解的稳定性及氢在贮氢合金中的扩散系数等的影响。结果表明:随Co含量的增大,晶胞体积增大,氢化物分解的焓变增大,低温放电容量减小。氢扩散是影响贮氢合金的低温放电性能的重要因素。The effects of Co content on the discharge capacity, the stability of hydride, the density of exchange current on the electrode surface, and the diffusion coefficient of hydrogen in the AB5-type hydrogen storage alloys at –40℃ were investigated. It showed that the unit cell volume was increased, and the discharge capacity was decreased with the increase of the Co content. And the hydrogen diffusion was an important factor that influenced the discharge properties of hydrogen storage alloy at –40℃.

关 键 词：AB5型 贮氢合金 金属钴 低温放电性能 镍氢电池 

分 类 号：TG139.7[一般工业技术—材料科学与工程]