7. Transition metal composite hydroxide particles that are the precursor for cathode active material for a non-aqueous electrolyte rechargeable battery, comprising secondary particles that are formed by an aggregation of plate-shaped primary particles and fine primary particles that are smaller than the plate-shaped primary particles;
the secondary particles having a center section that is formed by an aggregation of the plate-shaped primary particles, and at least one layered structure of a low-density section that is formed by an aggregation of the fine primary particles and a high-density section that is formed by an aggregation of the plate-shaped primary particles on the outside of the center section; and
the secondary particles having an average particle size of 1 µm to 15 µm, and an index [(d90 - d10)/average particle size] that indicates the extent of the particle size distribution of 0.65 or less.
the secondary particles
average particle size
1 µm to 15 µm
µm
the secondary particles
particle size distribution
0.65 or less