提高AB_5型贮氢电极合金低温电化学性能研究

Improvement of the Low Temperature Electrochemical Performance of AB_5-type Hydrogen Storage Alloy

采用优化稀土成分并添加适量的硼改善AB5型贮氢合金的低温性能 .实验表明 ,含富Ce稀土及添加适量硼的AB5型合金 ,其低温电化学性能优良 ,能满足Ni/MH电池在低至 - 35℃小倍率电流密度放电的要求 .贮氢合金低温性能的改善与合金的微结构。

Optimizing the rare earth composition and doping with boron have been used to improve the low temperature performance of AB 5 hydrogen storage alloy.The results show that Ce-rich alloy with a proper amount of boron is suitable for Ni/MH battery with the lower-limit temperature down to 238 K under smaller current density (120 mA/g). The improvement of low temperature performance of hydrogen storage alloy is well consistent with its microstructure,thermodynamic and kinetic properties.