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:
Feb. 03, 2004
Filed:
Mar. 06, 2002
Ryo Sakai, Yokohama, JP;
Yasuhiro Shirakawa, Yokohama, JP;
Yasumasa Ooya, Fujieda, JP;
Koshin Tanaka, Shizuoka-ken, JP;
Hajime Takeuchi, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A positive electrode active material for nonaqueous electrolytic solution secondary batteries is substantially made of a Li containing transition metal composite oxide, which has a composition expressed by Li M S O (wherein M is a transition metal, such as Co, Ni, Mn, Fe and V, and 0.9≦x≦1.15, 0.8≦y≦1.00, and 0<z<0.001). Such positive electrode active material is excellent in particle size controllability (miniaturization and sharpening of the particle size distribution). A nonaqueous electrolytic solution secondary battery comprises a positive electrode, a separator, a negative electrode, a battery case accommodating these, and a nonaqueous electrolytic solution filled in the battery case. The positive electrode contains the positive electrode active material for the nonaqueous electrolytic solution secondary battery expressed by the aforementioned general formula.