| abstract |
The purpose of the present invention is to provide a positive electrode active material for a non-aqueous electrolyte secondary battery which is capable of high capacity and high output when said material is used. The method of manufacturing a positive electrode active material for a non-aqueous electrolyte secondary battery comprises: a first step for mixing an Li metal complex oxide powder comprising primary particles represented by the general formula Li z Ni 1-x-y Co x M y O 2 (wherein: 0 ≤ x ≤ 0.35,0 ≤ y ≤ 0.35, 0.97 ≤ z ≤ 1.30; and M is at least one element selected from Mn, V, Mg, Mo, Nb, Ti and Al) and secondary particles formed by aggregation of the primary particles with an alkali solution produced by dissolving a W compound so that the W concentration is 0.1 to 2 mol/L, at a solid/liquid ratio of the complex oxide powder to the water content of the solution in the range of 200 to 2500 g/L, and after immersion, separating the solid from the liquid so as to produce a W mixture in which W is uniformly dispersed on the surfaces of the primary particles of the complex oxide; and a second step for forming a compound including W and Li on the surfaces of the primary particles of the complex oxide powder by heat treating the mixture. |