Method for producing Ni-Co composite hydroxide

摘要

PROBLEM TO BE SOLVED: To provide a method for producing Ni-CO multiple hydroxide useful as stock of Li-Ni-Co multiple oxide used as the positive electrode material of a lithium secondary battery. SOLUTION: This Ni-Co multiple hydroxide is grains of Ni-Co multiple hydroxide formed from Ni and Co in the state of a solid soln. and/or in a coprecipitated state. The grains constitute practically spherical secondary grains formed by laminating and aggregating primary grains having one or more of platy, columnar and acicular grain shapes.