6. A method of preparing a precursor of the positive electrode active material for a secondary battery according to claim 1, the method comprising:
preparing a metal-containing solution by mixing a nickel raw material, a cobalt raw material, and a manganese raw material; and
introducing an ammonium cation-containing complex former and a basic compound into the metal-containing solution and subjecting the resultant to a coprecipitation reaction at a pH of 10.50 to 12.00 and a temperature of 50 ℃ to 70 ℃,
wherein the ammonium cation-containing complex former is introduced at a rate of 0.5 to 1.5 times relative to the rate of introduction of the metal-containing solution.
coprecipitation reaction
pH
10.50 to 12.00
coprecipitation reaction
temperature
50 ℃ to 70 ℃
℃