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. 23, 2019
Filed:
Dec. 22, 2015
SK Innovation Co., Ltd., Seoul, KR;
SK INNOVATION CO., LTD., Seoul, KR;
Abstract
A lithium secondary battery including a cathode, an anode and a non-aqueous electrolyte. The cathode includes a cathode active material containing lithium-metal oxide of which at least one of metals has a concentration gradient region between a core part and a surface part thereof. The lithium-metal oxide includes elements M1, M2, and M3. M3 has a concentration gradient region with increased concentration between the core part and the surface part, M1 has a concentration gradient region with decreased concentration between the core part and the surface part, and M2 has a constant concentration from the core part and the surface part. The anode includes graphite having an average lattice distance d002 of 3.356 to 3.365 Å.