| 摘要 |
PROBLEM TO BE SOLVED: To provide a production method of a nickel cobalt aluminum complex hydroxide, having excellent cycle characteristics and safeness, a small diameter and high uniformity of particle size, and a production method of a positive electrode active substance for a non-aqueous electrolyte secondary battery.SOLUTION: First in a nucleation step, a nucleation aqueous solution containing a metal compound containing nickel, a metal compound containing cobalt, an ammonium ion supplying material, and an aluminum source is controlled to have a pH value of 12.0 to 13.4 at a reference liquid temperature of 25°C to nucleate. Then in a particle growth step, the nucleation aqueous solution obtained in the nucleation step is controlled to have a pH value of 10.5 to 12.0 at the reference liquid temperature of 25°C to obtain a particle growth aqueous solution to grow particles. In the nucleation step, an aqueous solution containing aluminum and sodium is used as the aluminum source in the nucleation aqueous solution, and a molar ratio of aluminum to sodium in the aqueous solution containing aluminum and sodium is controlled to 1.5 to 3.0.SELECTED DRAWING: None |
