Patent ID: 8945770
Filing Date: 2015-02-03
Classification: C01G,C01P,H01M,Y02E,Y02P,Y02T

Abstract:
1. A cathode active material comprising: a lithium transition metal oxide based on at least one transition metal selected from the group consisting of Ni, Mn and Co, wherein the lithium transition metal oxide contains fluorine, 50 to 99.9% of a total weight of fluorine contained in the active material is present on a surface of the lithium transition metal oxide, and at least one metal selected from a group consisting of Mg, Ti, Zr, Al and Fe as well as sulfur (S) are further contained in the lithium transition metal oxide, wherein a content of the sulfur ranges from 0.005 to 5 wt. % relative to a total weight of the lithium transition metal oxide, wherein the lithium transition metal oxide is represented by the following Formula 1: wherein, −0.3≦a≦0.3; 0≦w<0.8; 0<x<0.8; 0.001<y<0.02; 0.005<z<0.1; 0≦(1−w−x−y−z)<0.5; D D D y denotes a doping amount of D z denotes the sum of doping amounts of D D y′ denotes a coating amount of D z′ denotes the sum of coating amounts of D