Method for producing a positive electrode active material for an alkaline storage battery
AssigneeMatsushita Electrical Industrial Co., Ltd.
InventorsFutoshi Tanigawa, Yasushi Nakamura, Yoshitaka Dansui, Kohji Yuasa
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Abstract
The method for producing a positive electrode active material for an alkaline storage battery is disclosed. The method includes a first oxidation treatment of a raw material powder comprising a nickel hydroxide solid solution and cobalt hydroxide to oxidize the cobalt hydroxide to a cobalt oxyhydroxide; and a second oxidation treatment of the powder obtained in the first oxidation treatment to oxidize the nickel hydroxide solid solution to a nickel oxyhydroxide solid solution.
Claims11
A method for producing a positive electrode active material for an alkaline storage battery, comprising:
- (a) a first oxidation treatment of a raw material powder, which comprises a nickel hydroxide solid solution and cobalt hydroxide, to oxidize said cobalt hydroxide to a cobalt oxyhydroxide;
- and
- (b) a second oxidation treatment in which the treated powder from step (a), comprising nickel hydroxide solid solution and cobalt oxyhydroxide, is treated to oxidize said nickel hydroxide solid solution to a nickel oxyhydroxide solid solution.
A method for producing a positive electrode active material for an alkaline storage battery, comprising
- a process where a nickel hydroxide solid solution powder having a-cobalt hydroxide carried thereon is dispersed in an aqueous alkaline solution of 25 to 80° C. having a pH value of not more than 10 and mixed with an oxidizing agent to give a positive electrode active material comprising a nickel oxyhydroxide solid solution powder having a cobalt oxyhydroxide carried thereon.
Dependencies are inferred from the claim text.