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用感应熔炼法制备了(La1-xNdx)0.8Mg0.2Ni3.4Al0.1(x=0~0.4)储氢合金。采用XRD、恒电流充放电技术研究了Nd部分替代La对合金结构和电化学性能的影响。XRD分析表明该合金为多相结构,合金主相由(La,Mg)2Ni7相变成(La,Mg)5Ni19。电化学性能研究表明,随着Nd的加入,合金电极放电容量先增加后减小。当x=0.1时,放电容量达到最大值365.0 m Ah·g-1。同时Nd的加入导致合金电极电化学循环性能和高倍率放电性能下降。
(La1-xNdx) 0.8Mg0.2Ni3.4Al0.1 (x = 0 ~ 0.4) hydrogen storage alloys were prepared by induction melting method. XRD and galvanostatic charge-discharge techniques were used to investigate the effect of substitution of La on the structure and electrochemical properties of the alloy. XRD analysis shows that the alloy is multiphase. The main phase of the alloy is (La, Mg) 2Ni7 transformed into (La, Mg) 5Ni19. Electrochemical performance studies show that with the addition of Nd, the discharge capacity of the alloy electrode first increases and then decreases. When x = 0.1, the discharge capacity reached a maximum of 365.0 m Ah · g-1. At the same time, the addition of Nd leads to the decrease of electrochemical cycling performance and high rate discharge performance of the alloy electrode.