6. Claim 1-4 of, any one Li-Ni producing composite oxide particles, characterized in:
A powder of a lithium compound, Ni-Co hydroxide particle powder, aluminum powder and/or zirconium compound mixing powder of the compound, firing the obtained mixture,
Ni-Co hydroxide particles obtained by powder, aqueous solution comprising a metal sulfate, aqueous ammonia and aqueous sodium hydroxide mixture, ammonia concentration is 1.4 mol/L so that the reaction tank is controlled below, and the (ammonia concentration of the reaction vessel)/(concentration of the reaction vessel remaining hvdroxide) of 6 or more, obtaining Ni-Co hydroxide.
reaction tank
ammonia concentration
1.4 mol/L
mol/L