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用共沉淀还原扩散法制备了不同化学计量比的LaMg2Ni9-xCox(x=0.3~6.0)稀土镁基贮氢电极合金。电化学测试结果表明:在x逐渐增大的过程中,合金的活化次数没有发生明显的变化,合金的放电容量逐渐减小,合金的循环稳定性逐渐增强。其中LaMg2Ni6.3Co2.7合金电极表现出的综合电化学性能较优。
LaMg2Ni9-xCox (x = 0.3 ~ 6.0) rare earth-based Mg-based hydrogen storage electrode alloys with different stoichiometric ratios were prepared by coprecipitation reduction diffusion method. The results of electrochemical tests show that during the process of x increasing, the activation frequency of the alloy does not change obviously, the discharge capacity of the alloy gradually decreases, and the cycle stability of the alloy gradually increases. The LaMg2Ni6.3Co2.7 alloy electrode showed better electrochemical performance.