5. Claim 1-4 of, any one Li-Ni producing composite oxide particles, characterized in:
With powder of a lithium compound Ni-Co hydroxide particles mixed powder, firing the obtained mixture,
Ni-Co hydroxide particles obtained by powder, aqueous solution comprising a metal sulfate, aqueous ammonia and aqueous sodium hydroxide mixed, controls such that the reaction tank ammonia concentration is 1.4 mol/L or less, and the (ammonia concentration of the reaction vessel)/(concentration of remaining reaction tank hvdroxide) of 6 or more, obtaining Ni-Co hydroxide.
controls such that the reaction tank
ammonia concentration
1.4 mol/L
mol/L