6. A method for preparing the precursor of a positive electrode active material for a secondary battery of 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
and introducing an ammonium cation-containing complex forming agent and a basic compound to the metal-containing solution and co-precipitation reacting the result under a pH of 10.50 to 12.00 and a temperature of 50° C. to 70° C.,
wherein the ammonium cation-containing complex forming agent is introduced at a rate of 0.5 times to 1.5 times with respect to an introduction rate of the metal-containing solution.
pH
10.50 to 12.00
temperature
50° C. to 70° C
° C
ammonium
at a rate
0.5 times to 1.5 times with respect to an introduction rate of the metal-containing solution