| 摘要 |
PROBLEM TO BE SOLVED: To provide a coil or button shaped alkaline storage battery containing no mercury. SOLUTION: The alkaline storage battery comprises a positive electrode can 2 having a positive electrode mix 1 provided with silver oxide or manganese dioxide as a positive electrode active substance and a negative electrode cup 4 having a negative electrode mix 3 provided with zinc or zinc alloy powder as a negative electrode active substance, having a turn-around portion 4a on the outer periphery and a turn-around bottom portion 4b and the inner face formed of copper, both being sealed via a gasket 6. A separator 5 is provided between the positive electrode mix 1 and the negative electrode mix 3, and an alkaline electrolytic solution is filled therein. An inner face area of the negative electrode cup 4 excluding the turn-around portion 4a and the turn-around bottom portion 4b is coated with a metal or an alloy 10 having higher hydrogen overvoltage than copper and the ratio O/Cu of oxygen in the turn-around portion 4a and the turn-around bottom portion 4b of the negative electrode cup 4 to copper as a base material is 0.54 or less is Auger electron spectroscopy.
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