| 摘要 |
PROBLEM TO BE SOLVED: To substantially improve discharge characteristics at low temperatures and discharge characteristics at large current, for a nickel hydride storage battery using for a negative electrode a hydrogen storage alloy with Mg or the like contained in a rare-earth metal/nickel group hydrogen storage alloy. SOLUTION: In the nickel hydride storage battery provided with a positive electrode, a negative electrode using the hydrogen storage alloy, and alkaline electrolyte solution, one containing at least rare-earth element, Mg, and Ni, with an intensity ratio I<SB>A</SB>/I<SB>B</SB>of a greatest peak intensity I<SB>A</SB>appearing within the range of 2θ=31°to 33°to a greatest peak intensity I<SB>B</SB>appearing within the range of 2θ=40°to 44°in an X-ray diffraction measurement with Cu-Kαrays as an X-ray source of 0.1 or more and with a mol ratio of magnesium to a total volume of the rare-earth element and magnesium of 0.3 or more is used as the hydrogen storage alloy. COPYRIGHT: (C)2005,JPO&NCIPI
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