| abstract |
A positive electrode active material precursor capable of improving battery characteristics of a non-aqueous electrolyte secondary battery is obtained. Ni 1-x-yz Co x Mn y M z (OH) 2 + A (where 0 ≦ x ≦ 0.35, 0 ≦ y ≦ 0.35, 0 ≦ z ≦ 0.1, 0 0.1 ≦ x + y + z ≦ 0.7, 0 ≦ A ≦ 0.5, M is nickel represented by at least one additive element selected from V, Mg, Al, Ti, Mo, Nb, Zr and W) When producing a composite hydroxide, a crystal nucleation aqueous solution containing cobalt and / or manganese is produced at a pH of 7.5 to 11.1 based on a liquid temperature of 25 ° C. The pH of the slurry for particle growth containing the crystal nuclei is 10.5 to 12.5 on the basis of a liquid temperature of 25 ° C., and a mixed aqueous solution containing a metal compound containing at least nickel is supplied to form the plate crystal nuclei into particles Grow. [Selection] Figure 1 |