La对不包覆La_xMm_(1-x)(NiCoMnAl)_5合金电化学性能的影响

Effect of La content on the electrochemical properties of uncoated La xMm 1-x (NiCoMnAl) 5 hydrogen storage alloy

研究了Ｌａ含量对贮氢合金ＬａｘＭｍ１－ｘ（ＮｉＣｏＭｎＡｌ）５的电化学性能的影响。结果表明：随着Ｌａ含量的增大，合金的活化性能、放电容量、高倍率充放电性能均提高。荷电保持能力先增后减，充放电循环寿命降低。该合金的１Ｃ最大放电容量大于３００ｍＡｈ／ｇ。

The effect of La content on the electrochemical properties of uncoated La xMm 1-x (NiCoMnAl) 5 hydrogen storage alloy has been studied. The results indicate that with the increase of La content in the alloy, the activation property, discharge capacity and high rate dischargeability increase. In addition, its charge retention ratio increase first and then decrease, while its charge discharge cycle life decrease. The highest discharge capacity (in 1C) of this alloy is more than 300 mAh/g.