Cobalt compound for use in alkaline storage battery, method for manufacturing the same, and positive electrode plate of alkaline storage battery employing the same

摘要

To provide an alkaline storage battery, a cobalt compound obtained by mixing a cobalt hydroxide powder and a sodium hydroxide powder and applying a heat treatment to the same in an atmosphere containing oxygen, a cobalt compound obtained by adding a sodium hydroxide aqueous solution and an aqueous solution containing an oxidizing agent to a cobalt hydroxide powder, or a cobalt compound obtained by baking a cobalt hydroxide powder in an atmosphere containing oxygen is used. This oxidizing agent may comprise at least one selected from hydrogen peroxide, bromine, chlorine, sodium, hypochlorite and persulfate. This provides cobalt compounds suitable for producing long-life and highly reliable alkaline storage batteries, methods for manufacturing the same, and positive electrode plates of alkaline storage batteries employing the same.