HYDROGEN STORAGE ALLOY, AND NICKEL-HYDROGEN STORAGE BATTERY USING THIS ALLOY

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PROBLEM TO BE SOLVED : To provide a rare earth-Mg-Ni hydrogen storage alloy having excellent durability and also to provide a high-capacity nickel-hydrogen storage battery having excellent cycle life characteristics. SOLUTION : The hydrogen storage alloy has a composition represented by general formula ((PrNd)αCeβLn1-α-β)1-γMgγNiδ-ε-ζAlεTζ(wherein, Ln is at least one element selected from the group consisting of La, Pm and the like; T is at least one element selected from the group consisting of V, Nb and the like; and subscripts α, β, γ, δ, ε and ζ stand for the numbers satisfying relations of 0.6COPYRIGHT : (C)2007, JPO&INPIT