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. 24, 2012
Filed:
Dec. 14, 2004
Daisuke Kawasaki, Tokyo, JP;
Yuki Kusachi, Tokyo, JP;
Tatsuji Numata, Tokyo, JP;
Koji Utsugi, Tokyo, JP;
Daisuke Kawasaki, Tokyo, JP;
Yuki Kusachi, Tokyo, JP;
Tatsuji Numata, Tokyo, JP;
Koji Utsugi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A lithium secondary battery which has excellent characteristics such as energy density and electromotive force and is excellent in cycle life and storage stability is provided. The secondary battery comprises a positive electrode, a negative electrode, and an electrolyte solution comprising an aprotic solvent having at least an electrolyte dissolved therein, wherein the positive electrode comprises a lithium-manganese composite oxide having a spinel structure as a positive electrode active material, and the electrolyte solution comprises a compound represented by the general formula (1).