通过XRD, SEM-EDS等方法及电化学测试研究了稀土对Ti0.25V0.34Cr0.2Ni0.2合金的微观结构和电化学性能的影响. 结果表明, Ti0.25V0.34Cr0.2Ni0.2和Ti0.25V0.34Cr0.2Ni0.2RE0.01 (RE分别代表La, Ce, Pr, Nd和混合稀土)合金均由主相为体心立方结构的钒基固溶体相和少量TiNi基第二相组成. 稀土元素加入后, 合金bcc相的晶格参数略有增加; 镧在合金中发生偏析, 形成新相. 添加稀土元素能够加速合金的活化. 303 K温度下基准合金和含Pr合金电极实际测定的理论放电容量大致相等, 约为364 mAh·g-1. 合金的放电容量对温度的变化比较敏感, 高温有利于合金放电. 稀土对合金电极的荷电保持率产生不利影响; 混合稀土的添加能够改善合金的倍率放电性能.
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