Patent ID: 8173301
Filing Date: 2012-05-08
Classification: C01G,C01P,H01M,Y02E,Y02T

Abstract:
1. A positive electrode active material for a non-aqueous electrolyte secondary battery comprising a lithium-containing transition metal oxide having a closest-packed cubic structure of oxygen, wherein: said lithium-containing transition metal oxide has a composition represented by the formula (1): where x, y, and z represent element contents of nickel, manganese, and cobalt, respectively, and satisfy Ni, Mn and Co are evenly dispersed at atomic level in said lithium-containing transition metal oxide, and in a triangular phase diagram showing the element contents of nickel, manganese, and cobalt in terms of molar ratio, the composition represented by said formula (1) falls within a pentagonal region defined by five vertices satisfying (x:y:z)=(6:2:2), (5:2.5:2.5), (5:3.3:1.7), (6.36:2.73:0.091), and (6.25:2.5:1.25).