NICKEL-METAL HYDRIDE BATTERY AND METHOD FOR PRODUCING HYDROGEN STORAGE ALLOY

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The present invention aims to improve cycle characteristics in a nickel-metal hydride battery using a rare earth-Mg-Ni alloy. Specifically disclosed is a nickel-metal hydride battery comprising a negative electrode containing an La-Mg-Ni hydrogen storage alloy, which is characterized in that the hydrogen storage alloy has a crystalline phase having a Gd2Co7 type crystal structure, while containing calcium.