2. The positive electrode active material precursor for the non-aqueous electrolyte secondary battery according to claim 1, comprising:
a plurality of the nickel composite hydroxide particles, wherein
when a plurality of particles to be evaluated, which have a particle size that is greater than or equal to - 1 µm and less than or equal to +1 µm with respect to an average particle size of the plurality of the nickel composite hydroxide particles, are selected from the plurality of the nickel composite hydroxide particles, and
a cross section of each of the plurality of particles to be evaluated is divided into a plurality of regions by boundary lines arranged in a grid such that each of the plurality of regions partitioned by the boundary lines has a size of 2 µm square,
a ratio of a number of particles having particular characteristics among a number of the selected plurality of particles to be evaluated, is greater than or equal to 50%, the particular characteristics of the particles being that an average value of a ratio of an area of the void in an area of each of the plurality of regions partitioned by the boundary lines, is greater than or equal to 0.5% and less than or equal to 5.0%, and that a standard deviation of the ratio of the area of the void in the area of each of the plurality of regions partitioned by the boundary lines, is less than or equal to 1.0.
composite hydroxide particles
particle size
is greater than or equal to - 1 µm and less than or equal to +1 µm
µm