在Ar保护下采用磁悬浮感应熔炼制备(La0.8Nd0.2)2Mg(Ni0.9-xCo0.1Mnx)9 (x=0,0.05,0.1,0.15)合金,系统研究了元素替代及退火处理对合金相结构、吸放氢性能及电化学性能的影响.结果表明,合金相主要由(La,Nd) Ni5相、LaMg2Ni9相和(La,Nd)2 Ni7相组成,当x=0.15时,(La,Nd)2 Ni7相消失.随着Mn取代量的增加,合金的储氢量、放电容量先增加后减小,Mn的添加提高了合金的充放电循环稳定性.经1073K退火处理后合金的放电容量得到提高,循环稳定性能得到明显改善.
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