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:
Sep. 06, 2016
Filed:
Mar. 26, 2013
Tdk Corporation, Tokyo, JP;
Hideaki Seki, Tokyo, JP;
Tomohiko Kato, Tokyo, JP;
Hirofumi Nakano, Tokyo, JP;
Atsushi Sano, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
To provide an active material having high capacity and excellent cycle characteristics. An active material has a layered crystal structure and is expressed by a compositional formula (1) LiNiCoMnMO(1), where the element M is at least one kind of element selected from the group consisting of Al, Si, Zr, Ti, Fe, Mg, Nb, Ba, and V; 1.9≦(a+b+c+d+y)≦2.1; 1.05≦y≦1.35; 0<a≦0.3; 0<b≦0.25; 0.3≦c≦0.7; 0≦d≦0.1; and 1.9≦x≦2.1, and wherein 0.69≦Ni/Ni≦0.85, where Niis the Ni composition amount at a center portion of the active material primary particle, and Niis the Ni composition amount in the vicinity of a surface (in a width of 30 nm from the surface).