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:
Dec. 25, 2018
Filed:
Aug. 19, 2014
Nec Corporation, Tokyo, JP;
Tanaka Chemical Corporation, Fukui, JP;
Kentaro Nakahara, Tokyo, JP;
Ryota Yuge, Tokyo, JP;
Noriyuki Tamura, Tokyo, JP;
Sadanori Hattori, Tokyo, JP;
Kentaro Kuratani, Osaka, JP;
Kyousuke Doumae, Fukui, JP;
Hideka Shibuya, Fukui, JP;
Mitsuharu Tabuchi, Osaka, JP;
NEC Corporation, Tokyo, JP;
Tanaka Chemical Corporation, Fukui, JP;
Abstract
There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is reduced. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula (1) is coated with an inorganic material: LiMMnMFeO(1) (wherein 1.05≤x≤1.32, 0.33≤y≤0.63, 0.06≤z≤0.50, 0<p≤0.63, 0.06≤q≤0.50, 0≤δ≤0.80, y≥p, and z≥q; Mis at least one element selected from Ti and Zr; and Mis at least one element selected from the group consisting of Co, Ni and Mn).