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:
Sep. 16, 2003
Filed:
May. 20, 2002
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 4/58 ; H01M 4/52 ; C01G 5/304 ; C01G 5/104 ;
U.S. Cl.
CPC ...
H01M 4/58 ; H01M 4/52 ; C01G 5/304 ; C01G 5/104 ;
Abstract
An alkaline storage battery, a positive electrode material for the alkaline storage battery, and a method of preparation for the positive electrode material are disclosed. The positive electrode material is made up of nickel hydroxide particles that have cobalt oxyhydroxide on their surface. The particles may be prepared by a process in which &agr;-cobalt hydroxide adhered to the surface of the nickel hydroxide particles is oxidized to cobalt oxyhydroxide. The battery has a superior rate of utilization of active material, cycle life, and discharge characteristics.