为了提高Mg-Co系合金的放电容量及循环稳定性,通过机械合金化的方法,制备三元Mg_(45)M_5Co_(50)(M=Pd,Zr)合金。透射电子显微镜(TEM)分析表明,合金为体心立方相(BCC)的纳米晶结构。电化学测试表明,在Mg_(45)M_5Co_(50)(M=Mg,Pd,Zr)合金中,Mg_(45)Zr_5Co_(50)电极的容量最高,达到425 m A·h/g;相比Mg_(50)Co_(50),Mg_(45)Pd_5Co_(50)电极的首次放电容量(379 m A·h/g)与电化学动力学性能均得到提高。结果表明,通过用Zr和Pd元素替代Mg元素,Mg-Co基合金的电化学性能得到改善。 In order to improve the discharge capacity and cycle stability of Mg-Co-based alloys, ternary Mg 45 M 5 Co 50 (M = Pd, Zr) alloys were prepared by mechanical alloying. Transmission electron microscopy (TEM) analysis showed that the alloy is a nanocrystalline structure of the body-centered cubic phase (BCC). Electrochemical tests show that the capacity of Mg 45 Zr 5 Co 50 electrode is the highest in 425 Mg A · h / g Mg_ (45) M_5Co_ (50) (M = Mg, Pd and Zr) The first discharge capacity (379 m A · h / g) and electrochemical kinetics of Mg 50 Co 50 and Mg 45 Pd 5 Co 50 electrodes were improved. The results show that the electrochemical performance of Mg-Co-based alloys is improved by substituting Zr and Pd for Mg.