| 摘要 |
A hydrogen-absorbing alloy, which is used as a negative electrode material of nickel-metal hydride secondary batteries for hybrid electric vehicles, and particularly for batteries to drive electric motors of hybrid electric vehicles, is an AB5-type alloy having a CaCu5-type crystal structure and the general formula R NiaCobAlcMnd (R: mixture of rare earth metals), wherein 4.15≦̸a≦̸4.4, 0.15≦̸b≦̸0.35, 1≦̸c/d≦̸1.7, 5.25≦̸a+b+c+d≦̸5.45. |
