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. 06, 2005
Filed:
Oct. 14, 2003
Applicants:
Takayuki Aoshima, Yokohama, JP;
Iwao Soga, Yokohama, JP;
Inventors:
Takayuki Aoshima, Yokohama, JP;
Iwao Soga, Yokohama, JP;
Assignee:
Mitsubishi Chemical Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M010/40 ; H01M002/02 ; H01M004/02 ;
U.S. Cl.
CPC ...
Abstract
To increase safety against overcharging of a lithium secondary cell which uses a lithium-nickel compound oxide as a positive electrode active material. A lithium secondary cell comprises a casing () and a lithium secondary cell element () using a lithium-nickel compound oxide as a positive electrode active material, accommodated in the casing. The specific surface area of the lithium-nickel compound oxide is from 0.1 to 10 m/g, and a surface area capacity ratio S/C, i.e. a ratio of a cell surface area S (cm) to a cell capacity (mAh), is from 0.05 to 5.