NICKEL-HYDROGEN STORAGE BATTERY AND ITS MANUFACTURING METHOD

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PROBLEM TO BE SOLVED : To provide a nickel-hydrogen storage battery having a high capacity using a hydrogen storage alloy of rare earth-Mg-Ni system for a negative electrode in which oxidation and deterioration of the hydrogen storage alloy used in the negative electrode is suppressed and cycle life is improved. SOLUTION : The nickel-hydrogen storage battery has a negative electrode using a hydrogen storage alloy as expressed by a general formula : RE1-xMgxNiyAlzMa (wherein, RE is at least one element selected from rare earth element including Y, Zr, and Hf, M is an element excluding the group IA element, group VIIB element, group 0 element, the above RE, Mg, Ni, and AL, 0.10≤x≤0.30, 2.8≤y≤3.6, 0

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