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:
Mar. 06, 2018
Filed:
Mar. 10, 2010
Satoshi Kono, Osaka, JP;
Mitsuhiro Kishimi, Osaka, JP;
Atsushi Hatakeyama, Osaka, JP;
MAXELL HOLDINGS, LTD., Kyoto, JP;
Abstract
An electrode active material includes particles of a lithium-containing composite oxide represented by the general compositional formula: LiMO, where −0.15≦x≦0.15, and M represents an element group of three or more elements including at least Ni, Co and Mn, wherein the ratios of Ni, Co and Mn to the total elements constituting M satisfy 45≦a≦90, 5≦b≦30, 5≦c≦30 and 10≦b+c≦55, where the ratios of Ni, Co and Mn are represented by a, b and c, respectively, in units of mol %, the average valence A of Ni in the whole particles is 2.2 to 3.2, the valence B of Ni on the surface of the particles has the relationship: B<A, the average valence C of Co in the whole particles is 2.5 to 3.2, the valence D of Co on the surface of the particles has the relationship: D<C, and the average valence of Mn in the whole particles is 3.5 to 4.2.