Method of manufacturing hydrogen-absorbing alloy electrode

摘要

The method of manufacturing a hydrogen-absorbing alloy electrode according to this invention comprises the steps of: dissolving a particle surface of said hydrogen-absorbing alloy by a surface-treatment solution; and washing the hydrogen-absorbing alloy with the particle surface dissolved using an alkaline solution at a temperature of 30° C.~40° C. The metal ions dissolved by the surface-treatment solution can be completely washed away by the alkaline solution so that they will not be precipitated onto the surface of the hydrogen-absorbing alloy again as the hydroxide. In this case, the washing using the alkaline solution of which the temperature exceeds 40° C. dissolves an alloy component as well as the hydroxide. Therefore, the temperature of the alkaline solution used must be controlled at 40° C. or lower. On the other hand, if the temperature of the alkaline solution is lower than 30° C., the washing effect cannot be sufficiently shown, therefore temperature must be controlled at 30° C. or higher.