| 摘要 |
A nickel metal hydride storage battery including a positive electrode, a negative electrode including a hydrogen absorbing alloy, and an alkaline electrolyte, the hydrogen absorbing alloy containing at least a rare-earth element, magnesium, nickel and aluminum, and having an intensity ratio (I<SUB>A</SUB>/I<SUB>B</SUB>) of not smaller than 0.1 (where I<SUB>A </SUB>represents an intensity of the highest peak in a range of 2theta=30°~34° in an X-ray diffraction pattern using CuK<SUB>alpha</SUB>-radiation as the X-ray source and I<SUB>B </SUB>represents the intensity of the highest peak in a range of 2theta=40°~44° in an X-ray diffraction pattern using CuK<SUB>alpha</SUB>-radiation as the X-ray source), and the battery containing manganese in an amount of not greater than 1.0 wt % relative to the hydrogen absorbing alloy.
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