| abstract |
PROBLEM TO BE SOLVED: To provide a positive electrode active material for a non-aqueous electrolyte secondary battery that can be stably manufactured, has high initial discharge capacity, high safety, and good cycle characteristics, a method for manufacturing the same, and a non-aqueous electrolyte using the same as a positive electrode Provide the next battery. [Solution] [Li] 3a [Ni x Co y Mn z ] 3b [O 2 ] 6c (where the subscript of [] indicates a site, x = z, x + y + z = 1, 0.3 ≦ x ≦ 0.45, 0 0.1 ≦ y ≦ 0.4, 0.3 ≦ z ≦ 0.45), and a hexagonal lithium nickel cobalt manganese composite oxide having a layered structure, A positive electrode active material for a non-aqueous electrolyte secondary battery in which the site occupancy of metal ions other than nickel, cobalt, and manganese at the 3b site obtained from the Rietveld analysis of the diffraction pattern is 5% or less is obtained. [Selection] Figure 1 |