Patent ID: 10784500

Abstract:
In one aspect, a method for producing a positive electrode active material for a nonaqueous electrolyte secondary battery, includes mixing first lithium nickel composite oxide particles containing lithium tungstate and second lithium nickel composite oxide particles not containing lithium tungstate. The first lithium nickel composite oxide particles have a composition represented by Liz1Ni1-x1-y1Cox1M1y1O2, and include a core material containing secondary particles each corresponding to an aggregation of a plurality of primary particles, and the lithium tungstate existing on at least a part of a surface of the primary particles on a surface of and inside the first lithium nickel composite oxide particles. The second lithium nickel composite oxide particles have a composition represented by Liz2Ni1-x2-y2Cox2M2y2O2, and include secondary particles each corresponding to an aggregation of a plurality of primary particles.