采用真空感应熔炼的方法制备了（La，Mg）_1-x Zr _x Ni_3.3-2x Mn_2x （x=0、0.1、0.2）储氢合金，研究了Zr/Mn元素替代和退火处理对储氢合金相结构、显微形貌和电化学性能的影响。结果表明：Zr/Mn元素替代后储氢合金中出现了新相LaMgNi₄相，退火处理后储氢合金中LaNi₅相和LaMgNi₄相含量减小，（La，Mg）₂Ni₇相和（La，Mg）₅Ni₁₉相含量增加；当储氢合金中x值从0增加至0.2时，储氢合金电极的活化次数N_a逐渐减小、最大放电容量C_max逐渐降低，且相同x值时退火态储氢合金电极的C_max要高于铸态储氢合金电极。Zr/Mn元素替代会提高储氢合金电极的24 h荷电保持率、降低循环100次后的容量保持率，且退火后二者都会相对提高；铸态储氢合金电极的高倍率放电性能主要由氢扩散系数D₀决定，而退火态储氢合金电极的高倍率放电性能主要由交换电流密度I₀决定。

The（La，Mg）_1-x Zr _x Ni_3.3-2x Mn_2x （x=0，0.1，0.2） hydrogen storage alloys were prepared by vacuum induction melting.The effect of Zr/Mn element substitution and annealing treatment on the phase structure，microstructure and electrochemical properties of the hydrogen storage alloys was studied.The results showed that a new phase of LaMgNi₄ appeared in the hydrogen storage alloy after Zr/Mn element substitution，and the contents of LaNi₅ phase and LaMgNi₄ phase were decreased after annealing，the contents of（La，Mg）₂Ni₇ phase and（La，Mg）₅Ni₁₉ phase were increased.When the x value in the hydrogen storage alloy was increased from 0 to 0.2，the activation times N_a of the hydrogen storage alloy electrode was gradually decreased，the maximum discharge capacity C_max was gradually decreased，and the C_max of the annealed hydrogen storage alloy electrode was higher than that of the cast hydrogen storage alloy electrode at the same x value.The substitution of Zr/Mn could improve the charge retention rate of hydrogen storage alloy electrode in 24 h and reduce the capacity retention rate after 100 cycles，and both of them would be relatively improved after annealing.The high rate discharge performance of cast hydrogen storage alloy electrode was mainly determined by hydrogen diffusion coefficient D₀，while the high rate discharge performance of annealed hydrogen storage alloy electrode was mainly determined by exchange current density I₀.