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:
Jul. 03, 2001
Filed:
Mar. 01, 1999
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 4/32 ; H01M 4/50 ; H01M 4/58 ; H01M 4/52 ;
U.S. Cl.
CPC ...
H01M 4/32 ; H01M 4/50 ; H01M 4/58 ; H01M 4/52 ;
Abstract
The present invention discloses a cathode active material for an alkaline storage battery, which has a high energy density and a high cycle stability. The cathode active material includes particles of a solid solution or eutectic mixture nickel oxide, which has a crystal structure of &bgr;-Ni(OH),and contains at least Mn, where Mn has a mean valence of not less than 3.3, and a coating layer of a solid solution or eutectic mixture cobalt oxide formed on the surface of the particles, which contains at least one element of Ni and Mn.