| 摘要 |
PROBLEM TO BE SOLVED: To provide a nickel hydrogen storage battery having excellent high temperature continuous discharge characteristics and applicable to a backup power source for disaster prevention. SOLUTION: The composition of a hydrogen absorbing alloy contained in a negative electrode 4 of the nickel hydrogen storage battery is represented by general formula: ((PrNd)<SB>α</SB>Ln<SB>1-α</SB>)<SB>1-β</SB>Mg<SB>β</SB>Ni<SB>γ-δ-ε</SB>Al<SB>δ</SB>T<SB>ε</SB>. In the formula, Ln represents at least one kind selected from the group comprising La, Ce or the like, T represents at least one kind selected from the group comprising V, Nb or the like, and subscriptsα,β,γ,δ,εrepresent a number satisfying 0.7<α, 0.05<β<0.15, 3.0≤γ≤4.2, 0.15≤δ≤0.30, 0≤ε≤0.20. COPYRIGHT: (C)2007,JPO&INPIT
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