MANUFACTURING METHOD OF ALUMINUM-SUBSTITUTED alpha-TYPE NICKEL HYDROXIDE, AND POSITIVE ACTIVE MATERIAL FOR ALKALI SECONDARY BATTERY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing an aluminum-substituted α-type nickel hydroxide which scarcely contains impurities originated from organic substances and hardly transforms to a β-type in an alkali environment, and a positive electrode active substance for a nickel ion secondary battery using the same.

SOLUTION: The manufacturing method comprises immersing a substrate in a reaction solution containing a nickel fluorinated complex in the presence of an aluminum electrolyte containing metal aluminum and/or aluminum ions (Al3+) to deposit an α-type nickel hydroxide on the substrate surface. The positive electrode active substance for an alkali secondary battery uses the aluminum-substituted α-type nickel hydroxide manufactured by the manufacturing method.

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