摘要
采用在Ｍｌ（ＮｉＣｏＭｎＴｉ）５合金中添加不同量镁的方法，系统地研究了镁掺杂量对贮氢电极合金Ｍｌ（ＮｉＣｏＭｎＴｉ）５电化学性能的影响。结果表明，当镁掺杂量从０．００３％增加至０．２６３％时，合金的最大放电容量逐渐升高，但当镁掺杂量进一步增加时，合金的最大放电容量又逐渐降低；增加镁掺杂量可以改善合金的活化性能，而且随着镁掺杂量的增加合金的高倍率放电性能也有不同程度的提高，但合金的２４ｈ荷电保持能力却大幅度下降；此外，增加镁掺杂量会明显恶化合金的充放电循环稳定性。
The effects of doped magnesium content on electrochemical properties of Ml(NiCoMnTi) 5 hydrogen storage electrode alloy were systematically studied. The results showed that the discharge capacity is improved by increasing the magnesium content in the alloy from 0.003% to 0.263%, however, as the magnesium content increases from 0.263% to 1.090%, the capacity decreases gradually. As the magnesium content increases, the activation behaviour and high rate dischargeability are enhanced to some degree, but the self discharge rate of the alloy increases strongly. It was found that the cycling stability is rapidly deteriorated as the magnesium content increases.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
1999年第1期61-64,共4页
The Chinese Journal of Nonferrous Metals
基金
国家"八六三"计划资助项目
关键词
镁掺杂
贮氢电极合金
电化学性能
电池
Mg doping hydrogen storage electrode alloy electrochemical property
