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发明授权
CN101613818B 一种低成本贮氢合金及其制备方法和应用 有权 许可

一种低成本贮氢合金及其制备方法和应用
摘要：
本发明公开一种低成本贮氢合金，为AB5型合金，该贮氢合金通式为LaaM1-aNibCocMndAleCuf，式中，M为Ce、Pr、Nd、Pm、Sm、Dy、Y、Zr和Ti元素中的至少一种，a、b、c、d、e、f表示摩尔比，其数值范围为：0.3≤a≤0.8，3.6＜b≤4.1，0＜c≤0.15，0.3≤d≤0.65，0.04≤e≤0.35，0.3≤f≤1.0，5.1≤b+c+d+e+f≤5.35。该贮氢合金具有晶胞参数c轴与a轴长度之比(c/a)大于等于0.81的CaCu5晶体结构。本发明还公开了贮氢合金的制备方法，以及在镍氢电池负极材料中的应用。本发明提供的贮氢合金成本低并且具有良好的活化性能、放电容量和循环寿命。
摘要（英）：

The invention discloses a low cost hydrogen storage alloy which is AB5 type alloy with the general formula of Laa M(1-a) Nib Coc Mnd Ale Cuf, wherein M is at least one in Ce, Pr, Nd, Pm, Sm, Dy, Y, Zr and Ti; a, b, c, d, e and f represent mole ratio with the number range: a is more than or equal to 0.3 and less than or equal to 0.8, b is more than 3.6 and less than or equal to 4.1, c is more than0 and less than or equal to 0.15, d is more than or equal to 0.3 and less than or equal to 0.65, e is more than or equal to 0.04 and less than or equal to 0.35, f is more than or equal to 0.3 and less than or equal to 1.0, and the sum of b, c, d, e and f is more than or equal to 5.1 and less than or equal to 5.35. The hydrogen storage alloy has CaCu5 crystal structure, and the ratio (c/a) of lengths of c axis and an axis of the CaCu5 crystal structure is more than or equal to 0.81. The invention also discloses a preparation method of the hydrogen storage alloy as well as the application thereof in negative pole material of a nickel-metal hydride battery. The hydrogen storage alloy has low cost, good activation performance, large discharge capacity and long cycle life.

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