NICKEL COMPOUND HYDROXIDE AND METHOD FOR PRODUCING THE SAME, POSITIVE POLE ACTIVE SUBSTANCE FOR NONAQUEOUS ELECTROLYTE SECONDARY CELL AND METHOD FOR PRODUCING THE SAME, AND NONAQUEOUS ELECTROLYTE SECONDARY CELL

摘要

PROBLEM TO BE SOLVED: To make a lithium compound oxide, having a uniform and appropriate particle diameter and a high specific surface area due to a hollow structure, producible on an industrial scale.SOLUTION: The particle size distribution of a nickel compound hydroxide to be a raw material is controlled. The compound hydroxide has a structure having: a central portion comprising fine primary particles; and an outer shell portion present on the outside of the central portion and comprising plate-like primary particles larger than the primary particles. The compound hydroxide is obtained in such a manner that by pH control during crystallization, separation into a nucleation step and a particle growth step is performed, and a reaction atmosphere in each of the steps and a manganese content of a metal compound fed in each of the steps are respectively controlled.