The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2002
Filed:
Apr. 09, 2001
Applicant:
Inventors:
Futoshi Tanigawa, Fujisawa, JP;
Yasushi Nakamura, Kamakura, JP;
Yoshitaka Dansui, Fujisawa, JP;
Kohji Yuasa, Chigasaki, JP;
Assignee:
Matsushita Electrical Industrial Co., Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01B 1/02 ; H01M 4/58 ; H01M 4/52 ; H01M 4/32 ; C01G 5/104 ; C01G 5/304 ;
U.S. Cl.
CPC ...
H01B 1/02 ; H01M 4/58 ; H01M 4/52 ; H01M 4/32 ; C01G 5/104 ; C01G 5/304 ;
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.