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. 25, 2008
Filed:
May. 04, 2005
Nao Shimura, Kawasaki, JP;
Koshin Tanaka, Tokyo, JP;
Masahiro Sekino, Kawasaki, JP;
Asako Satoh, Yokohama, JP;
Shusuke Inada, Takasaki, JP;
Akira Yajima, Tokyo, JP;
Masayuki Oguchi, Yokohama, JP;
Nao Shimura, Kawasaki, JP;
Koshin Tanaka, Tokyo, JP;
Masahiro Sekino, Kawasaki, JP;
Asako Satoh, Yokohama, JP;
Shusuke Inada, Takasaki, JP;
Akira Yajima, Tokyo, JP;
Masayuki Oguchi, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A nonaqueous electrolyte secondary battery includes a nonaqueous electrolyte and a positive electrode including an active material containing lithium composite oxide powder, the lithium composite oxide powder includes secondary particles, exhibits a peak intensity ratio satisfying the following formula (4), satisfies the following formula (5), and has a particle distribution wherein a particle diameter at a volumetric cumulative frequency of 90% (D90) falls within the range of 10 to 25 m, and the nonaqueous electrolyte contains a sultone compound including a ring having at least one double bond;2≦()<5   (4)0.95≦()≦1.02.   (5)