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:
Dec. 05, 2000
Filed:
Aug. 06, 1998
Applicant:
Inventors:
Yoichi Izumi, Moriguchi, JP;
Hiroyuki Sakamoto, Neyagawa, JP;
Hidekatsu Izumi, Neyagawa, JP;
Isao Matsumoto, Osaka, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M / ; H01M / ;
U.S. Cl.
CPC ...
429223 ; 429224 ; 423594 ; 423599 ;
Abstract
A positive electrode active material, includes a .beta.-Ni(OH).sub.2 type nickel oxide (including hydroxide) containing Mn in the state of solid solution or coprecipitated state with an average valence of Mn being 3.3 valences or more and preferably with a ratio A2/A1 being 1.25 or less which is a ratio of integrated intensity A2 of a peak present at 2.theta.=18-21.degree. to integrated intensity A1 of a peak present at 2.theta.=37-40.degree. of powder X-ray diffraction using CuK.alpha. ray.