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:
Apr. 17, 2012
Filed:
Mar. 26, 2007
Isao Abe, Niihama, JP;
Satoshi Matsumoto, Niihama, JP;
Shuji Tsutsumi, Nara, JP;
Takashi Takeuchi, Osaka, JP;
Isao Abe, Niihama, JP;
Satoshi Matsumoto, Niihama, JP;
Shuji Tsutsumi, Nara, JP;
Takashi Takeuchi, Osaka, JP;
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The present invention provides a positive electrode active material for a non-aqueous electrolyte-based secondary battery, composed of a lithium/nickel composite oxide with high capacity, low cost and excellent heat stability, and a high safety non-aqueous electrolyte-based secondary battery. A positive electrode active material, comprising lithium/nickel composite oxide powders obtained by water washing fired powders having the following composition formula (1), followed by filtering and drying:LiNiMO  (1)(wherein, M represents at least one kind of an element selected from transition metal elements other than Ni, group 2 elements, or group 13 elements; and 'a' satisfies 0.01≦a≦0.5), characterized in that specific surface area of the lithium/nickel composite oxide powders after water washing is 0.3 to 2.0 m/g.