| abstract |
(a) preparing an aqueous metal salt solution comprising a lithium raw material, a manganese raw material, a nickel raw material and a cobalt raw material; (b) wet grinding the aqueous metal salt solution at 2000 to 6000 rpm for 2 to 12 hours using beads having a particle diameter of 0.05 to 0.30 mm to prepare a slurry; (c) adding a carbon source to the slurry; (d) spray drying the slurry of step (c) to prepare a mixed powder; And (e) is produced by a method comprising the step of heat-treating the mixed powder, and relates to a method for producing a cathode active material for a lithium secondary battery represented by the following formula (1). [Formula 1] Li w Ni x Co y Mn 1 -xy- z M z O 2 (1.2≤w≤1.5, 0 <x <0.5, 0 <y <0.5, 0.5 <1-xyz <1 0≤z <1, M is Al, Mg, Fe, Cu, Zn, Cr, Ag, Ca, Na, K, In, Ga, Ge, V, Mo, Nb, Si, Ti and Zr in the group consisting of at least one metal selected from the group) |