| 简介 |
PROBLEM TO BE SOLVED : To improve conductivity of a negative electrode in an alkaline storage battery that uses as its negative electrode a hydrogen storage alloy electrode employing a hydrogen storage alloy containing at least a rare-earth element, nickel, magnesium, and aluminum, to sufficiently enhance the cycle life of the alkaline storage battery.
SOLUTION : The negative electrode 2 of this alkaline storage battery uses a hydrogen storage alloy electrode employing a hydrogen storage alloy containing at least a rare-earth element, nickel, magnesium, and aluminum. A surface layer is formed on a surface of the hydrogen storage alloy, the surface layer having a weight ratio of aluminum to nickel less than that of the interior portion of the hydrogen storage alloy. The weight ratio of aluminum to nickel in the surface layer is set to 0.015 or less.
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