| 摘要 |
PROBLEM TO BE SOLVED: To provide a nickel-hydrogen storage battery, having enhanced capacity density and high positive electrode characteristics by improving a positive electrode active material. SOLUTION: A nickel-hydrogen storage battery consist of a positive electrode, a negative electrode, an 8-12 mol/l-aqueous solution of sodium hydroxide as an alkaline electrolyte and a separator. Nickel hydroxide as the principal active material of the positive electrode is formed by soluting 8-12 atomic %-Mn into its metal nickel. The nickel hydroxide under a charged state is of a hexagonal system or a tetragonal system having a diffraction peak on a (001) plane at around the 16-19 degrees of a diffraction angle, 2θ, at X-ray diffraction using CUKαas a radiation source. Its ordered arrangement has a NaCl-type structure.
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