研究了Fe替代Co对Mm(NiMnSiAl)4.3Co0.6-xFex(x=0,0.2,0.4,0.6)贮氢合金电化学性能和相结构的影响.研究结果表明:Fe替代Co使合金的放电容量降低,但使合金的循环稳定性得到改善;合金具有双相结构,主相为CaCu5型相,还有少量的第二相Ce2Ni7相,随着Fe替代量的增加,第二相没有明显变化,但合金的点阵常数和晶胞体积略有增加,这是Fe替代Co使合金循环稳定性得以改善的一个主要原因.
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