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:
Jun. 02, 1998
Filed:
Dec. 12, 1995
Applicant:
Inventors:
Takeshi Yao, Kamakura, JP;
Michio Ito, Yokohama, JP;
Tadaya Okada, Kamakura, JP;
Hajime Konishi, Chigasaki, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429223 ; 423592 ;
Abstract
Provided are alkaline storage batteries which are higher in active material utilization as compared with conventional batteries and which can maintain the high utilization even after long-term charge-discharge cycle. Cobalt hydroxide having a BET specific surface area of 20-30 m.sup.2 /g and obtained by neutralization reaction of a cobalt salt solution and an aqueous alkali solution in the presence of a reducing agent is added to a positive electrode active material.