研究了稀土氧化物La2O3,CeO2,Nd2O3和Y2O3对AB5型贮氢电极电化学性能的影响.研究表明,除Y2O3外,其余的稀土氧化物可提高贮氢电极的1C放电容量和放电电压,延长贮氢电极的循环寿命,且对贮氢电极性能有利的顺序为:La2O3＞CeO2＞Nd2O3稀土氧化物添加量越多,贮氢电极的循环稳定性越好,但对贮氢电极的1 C放电容量和放电电压的影响存在最佳值.造成这些结果的原因是:稀土氧化物增大贮氢合金颗粒间的接触电阻;稀土氧化物的催化作用;稀土氧化物对镍催化剂的稳定作用及抑制贮氢合金进一步氧化的作用.
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