研究了Al元素对合金La0.67Mg0.33Ni3.0中Ni的替代对合金的微观组织结构及电化学性能的影响.X射线衍射(XRD)分析结果表明,La0.67Mg0.33Ni3.0合金由PuNi3型(La,Mg)Ni3相和Ce2Ni7型(La,Mg)2Ni7相组成 ,Al元素加入后,开始出现CaCu5型LaNi5相,随着Al含量的增加,LaNi5相逐渐增多,当x=0.3时,LaNi5相成为合金的主相,合金La0.67Mg0.33Ni2.7Al0.3中Al的X荧光元素面分布图像表明了Al元素主要进入LaNi5相中,说明Al是一种LaNi5相形成元素;电化学测试表明,随着Al含量的增加,合金的最大放电容量依次下降,4种合金的最大放电量分别为392、324、267和252mAh/g,活化次数变化不大(2～3次即可活化),循环稳定性先增加后下降.
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