Patent ID: 9105371
Filing Date: 2015-08-11
Classification: H01B,H01M,Y02E,Y02T

Abstract:
1. A cathode active material comprising a combination of a lithium manganese composite oxide having a spinel structure represented by the following Formula 3 with a lithium nickel composite oxide represented by the following Formula 2, wherein the oxide of Formula 3 is mixed with the oxide of Formula 2 in a weight ratio of 50:50 to 99:1, the cathode active material having a potential region (potential plateau) at 3.0 to 4.8V upon initial charge: wherein 0.9≦x≦1.2, and 0.4≦y≦0.5, and wherein 0≦y′≦0.1, 0.5<z′≦0.9, and 0≦z″<0.2; M′ is at least one selected from the group consisting of elements stable for 6-coordination; and A′ is at least one monovalent or bivalent anion.