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通过稀土族金属中铈、镨和钕部分替代ＡＢ５储氢合金中的镧，研究了稀土组元变化（共１３组成分变化）对合金电极电化学性能的影响。结果表明稀土组元含量变化明显影响合金电极的电化学性能。镨对保持储氢合金电极的高放电容量有利，当含０．２％（摩尔分数）时放电容量达２９０ｍＡ·ｈ／ｇ，铈则相反；随钕含量的增加，电池的放电容量也降低。
Through the substitution of cerium, praseodymium and neodymium in rare earth metals for the lanthanum in AB5 hydrogen storage alloys, the effect of rare earth element variation (total of 13 composition changes) on the electrochemical performance of the alloy electrodes was studied. The results show that the content of rare earth elements significantly affect the electrochemical properties of the alloy electrode. Praseodymium is favorable for maintaining the high discharge capacity of the hydrogen storage alloy electrode. The discharge capacity is 290mA · h / g when containing 0.2% (mole fraction), while the opposite is for cerium. The discharge capacity of the battery also decreases with the increase of neodymium content.