研究了混合稀土中常见杂质锌、铁、镁对贮氢电极材料的贮氢性能、电化学性能等的影响。结果表明：它们的存在使合金的吸氢平台压力及吸氢量有所改变，同时电极的大电流放电特性也发生变化，但对其放电容量影响不大。 The effects of zinc, iron and magnesium, which are common impurities in mixed rare earths, on the hydrogen storage and electrochemical properties of hydrogen storage electrode materials were studied. The results show that the existence of hydrogenation changes the pressure of hydrogen absorption platform and hydrogen absorption capacity of the alloy, meanwhile, the discharge characteristics of the electrode also change, but its discharge capacity has little effect.