系统研究了La0.8-xPrxMg0.2Ni3.8和La0.8-xPrxMg0.2Ni3.2AI0.2Co0.4(x=0,0.15,0.3,0.4)两组储氢合金的相结构与电化学性能.相结构分析表明,合金主要由Pr5C019、Ce5C019、CaCus型物相组成.随着x的增加,合金中A5B19(Pr5Col9+Ce5Col9)型物相逐渐增多,同时各物相的晶胞参数(a,c)和晶胞体积(v)均减小.Al元素的加入有利于CaCu5型物相的形成.电化学测试表明,A5B19型相合金具有较好的电化学循环稳定性,Al、Co元素的加入有利于A5B19型相合金电极的电化学循环稳定性.
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