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. 01, 2020
Filed:
Jan. 20, 2016
Umicore, Brussels, BE;
Umicore Korea Ltd., Chungnam, KR;
Xin Xia, Cheonan, KR;
Jens Paulsen, Daejeon, KR;
Shinichi Kumakura, Kobe, JP;
Song-Yi Han, Daejeon, KR;
Umicore, Brussels, BE;
Umicore Korea Ltd., Chungnam, KR;
Abstract
This invention discloses a lithium metal oxide powder for a cathode material in a rechargeable battery, consisting of a core and a surface layer, the core having a layered crystal structure comprising the elements Li, M and oxygen, wherein M has the formula M=(Ni(NiMn)Co)A, with 0.15≤x≤0.30, 0.20≤z≤0.55, x+y+z=1 and 0≤k≤0.1, wherein A is a dopant, wherein the Li content is stoichiometrically controlled with a molar ratio 0.95≤Li:M≤1.10; and wherein the surface layer comprises the elements Li, M' and oxygen, wherein M′ has the formula M′=(Ni(NiMn)Co)A, with x′+y′+z′=1 and 0≤k′≤0.1, and wherein y′/(y′+2z′)≥1.1*[y/(y+2z)]. The surface layer may also comprise at least 3 mol % Al, the Al content in the surface layerbeing determined by XPS.