Lithium-nickel-cobalt-manganese-containing composite oxide, raw material for positive electrode active material for lithium secondary battery and production method thereof

摘要

Nickel-cobalt-manganese complex hydroxide in which primary particles are aggregated to form secondary particles by reacting an aqueous solution of nickel-cobalt manganese salt, an aqueous solution of alkali metal hydroxide, and an ammonium ion supplier under specific conditions. A general formula LipNixMn1-x-, which is obtained by synthesizing aggregated particles and dry-mixing nickel-cobalt-manganese composite oxyhydroxide aggregated particles obtained by allowing an oxidant to act on the aggregated particles and lithium salt and firing them in an oxygen-containing atmosphere. yCoyO2-qFq (where 0.98 ≦ p ≦ 1.07, 0.3 ≦ x ≦ 0.5, 0.1 ≦ y ≦ 0.38, 0 ≦ q ≦ 0.05). Lithium-nickel-cobalt-manganese-containing composite oxide with a wide usable voltage range, high charge / discharge cycle durability, high capacity, and high safety for lithium secondary batteries Obtain the active material.