| 简介 |
An alkaline storage battery includes a positive electrode (1) a negative electrode (2), and an alkaline electrolyte solution. The negative electrode uses a hydrogen-absorbing alloy powder containing at least a rare-earth element, Mg, Ni, and Al, and has an intensity ratio IA/IB of 0.1 or greater in X-ray diffraction analysis using Cu—Kα radiation, where IA is the strongest peak intensity that appears in the range of 2θ=31 to 33°, and IB is the strongest peak intensity that appears in the range of 2θ=40 to 44°. When the alkaline storage battery is activated, the condition M1/M2≦0.18 is satisfied, where M1 is a Mg concentration in a region of particles of the hydrogen-absorbing alloy powder within 30 nm from the surface thereof and M2 is a Mg concentration in an inner region of the hydrogen-absorbing alloy particles in which the oxygen concentration is less than 10 weight %. |
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