NEGATIVE-ELECTRODE MATERIAL FOR NICKEL HYDROGEN BATTERY, METHOD OF TREATING THE SAME, AND NICKEL H

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A negative electrode material for a nickel-metal hydride battery containing a hydrogen-absorbing alloy represented by a general formula : Mm1-aT1aNixAlyMnzCobT2c, in which : Mm is at least one of light rare earth elements; T1 is at least one selected from the group consisting of Mg, Ca, Sr and Ba; T2 is at least one selected from the group consisting of Sn, Cu and Fe; and 0.015 ≦ a ≦ 0.5, 2.5 ≦ x ≦ 4.5, 0.05 ≦ y + z ≦ 2, 0 ≦ b ≦ 0.6, 0 ≦ c ≦ 0.6 and 5.6 ≦ x + y + z + b + c ≦ 6 are satisfied.