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:
Nov. 15, 2005
Filed:
Jan. 17, 2002
Applicant:
Michio Takahashi, Nagoya, JP;
Inventor:
Michio Takahashi, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M002/00 ;
U.S. Cl.
CPC ...
Abstract
A lithium secondary battery using lithium manganese oxide as a positive active material and having excellent charge and discharge cycle properties. As a positive active material of a lithium secondary battery, lithium manganese oxide having a cubic spinel structure, in which the strength ratio (P/Pstrength ratio) of the primary endothermal peak (P) appearing around 950° C. and the secondary endothermal peak (P) appearing around 1100°0 C. in differential thermal analysis is under 1, is used.