Method of producing ni- composite metal hydroxide, ni-composite metal hydroxide obtained thereby

PURPOSE: A method for producing nickel-based composite metal hydroxide is provided to synthesize Ni_(1-x-y-z)Co_xMn_yM_z(OH)_2 which is opponents bigger than 20 micron in a short reaction time by controlling an equivalence ratio of precipitation agents/metal salts. CONSTITUTION: A method for producing nickel-based composite metal hydroxide comprises the steps of: adding a metal salt solution, precipitation agent and dye fixing agent; injecting precipitation agent/metal salts so that an equivalence ratio is 1.4 or more and growing particles by controlling an equivalence ratio to 0.4 or less; and enhancing density of particles by maintaining an equivalence ratio of the precipitation agent/metal salts to 1.0.