稀土成分对贮氢合金RE（NiCoMnTi）_5电化学性能的影响

系统地研究了稀土组元（ＲＥ＝Ｌａ１－ｘ－ｙ－ｚＣｅｘＮｄｙＰｒｚ）对贮氢合金ＲＥ（ＮｉＣｏＭｎＴｉ）５电化学性能的影响．结果表明，Ｌａ，Ｃｅ，Ｎｄ和Ｐｒ的含量及比例对合金性能有显著影响．为描述稀土组元综合效应，本文引入四组元受约束的成分四边形来表征Ｌａ，Ｃｅ，Ｎｄ和Ｐｒ的成分变化，在此基础上，作出合会的性能对稀土成分的分布图．根据该图，可选择适当的稀土成分，来获得性能优异的贮氢合金电极材料．

INFLUENCE OF RARE EARTH COMPOSITION ON ELECTROCHEMICAL PROPERTIES OF RE(NiCoMnTi)_5 HYDROGEN STORAGE ALLOYS

The electrochemical properties of RE(NiCoMnTi)5 hydrogen storage alloys with different compositions of rare earth components (RE= La1-x-y-zCexNdyPrz) were systematically examined. The results showed that all La, Ce, Nd and Pr had an intense effect on the electrode performance. To show synthetic effect of rare earth elements, isographs of alloy electrodes vs quasi-ternary rare earth composition of the alloys were accomplished by first dividing the component elements into two groups and fixing definite ratios between the groups and then using a computer program for engineering graphics. The isographs were used to evaluate the properties of the multicomponent RE(NiCoMnTi)5 hydrogen storage alloys studied.