1. Transition metal composite hydroxide particles which are precursors of positive electrode active materials for nonaqueous electrolyte secondary batteries, wherein,
the transition metal composite hydroxide particles are composed of a plurality of plate-like primary particles and secondary particles formed by aggregating fine primary particles smaller than the plate-like primary particles,
the secondary particles have a central portion formed by the aggregation of the plate-like primary particles, and have a layered structure formed by the lamination of a low-density portion formed by the aggregation of the fine primary particles and a high-density portion formed by the aggregation of the plate-like primary particles outside the central portion,
the average value of the ratio of the outer diameter of the central portion to the particle diameter of the secondary particles is 30 to 80%, and the average value of the ratio of the thickness of the high-density portion in the diameter direction to the particle diameter of the secondary particles is 5 to 25%,
the secondary particles have an average particle diameter of 1 to 15 [ mu ] m, and the [ (d90-d 10)/average particle diameter ] as an index indicating the width of the particle size distribution is 0.65 or less.
the secondary particles
average particle diameter
1 to 15 [ mu
mu
the secondary particles
particle size distribution
0.65 or less