| abstract |
The present invention relates to a method for producing a cathode active material for a lithium secondary battery, the method comprising the step of refluxing the lithium salt and cobalt salt in a basic aqueous solution. The cobalt-based positive electrode active material prepared by this manufacturing method is selected from compounds of the following formulas (1) to (3), has a spherical or pseudo-spherical shape, has a particle size of 10 nm to 10 µm and a surface area of 0.1 to 5 m 2 / g. The positive electrode active material produced by this method is excellent in charge and discharge life characteristics.n n n [Formula 1]n n n Li x CoA 2 n n n [Formula 2]n n n Li x CoO 2-z A z n n n [Formula 3]n n n Li x Co 1-y M y A 2 n n n (Wherein, 0.5 ≦ x ≦ 1.5, 0.01 ≦ y ≦ 0.1, 0.01 ≦ z ≦ 0.5, and M is a transition metal selected from the group consisting of Ni, Mn, Mg, Fe, Al, La, Ce, Sr and Y) Or at least one or more metals of the lanthanide metal, or a semimetal selected from the group consisting of Si, B, Ti, Ga, and Ge, and A is selected from the group consisting of O, F, S, and P.) |