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. 24, 2019
Filed:
Jul. 28, 2017
Lg Chem, Ltd., Seoul, KR;
LG CHEM, LTD., Seoul, KR;
Abstract
Disclosed is a cathode active material comprising a combination of lithium manganese composite oxide with a spinel structure represented by the following Formula 1 and a specific oxide represented by the following Formula 2, the cathode active material having a broad potential region at 3.0 to 4.8V upon initial charge:LiMMnOA  ()wherein 0.9≤x≤1.2, 0<y<2, and 0≤z<0.2; M is at least one element selected from the group consisting of Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Ti and Bi; and A is at least one monovalent or bivalent anion,y'LiM′O.(1-y′)LiM″OA′  ()0<y′<1 and 0≤z′<0.2; M′ is at least one element selected form the group consisting of Mn, Sn and Zr having an oxidation number of +4; M″ is at least one element selected from the group consisting of Period I and II transition metals, including Ni, Mn and Co, which have a 6-coordination structure and are stable in a layered structure; and A′ is at least one monovalent or bivalent anion. Disclosed is also a secondary battery comprising the cathode active material.