| abstract |
The present invention relates to a method for producing a cathode active material comprising a pre-activation process of at least one lithium-transition metal oxide selected from compounds represented by the following formula (1) and a surface modification process of a pre-activated lithium transition metal oxide . (1-x) LiM'O 2-y A y -xLi 2 MnO 3 -y ' A y' (1) In this formula, M 'is Mn a M b ; M is one or more selected from the group consisting of Ni, Ti, Co, Al, Cu, Fe, Mg, B, Cr, Zr, Zn and two period transition metals; A is at least one selected from the group consisting of PO 4 , BO 3 , CO 3 , F and NO 3 anions, 0 < x <1; 0 < y? 0.02; 0 < y ' 0.5? A? 1.0; 0? B? 0.5; a + b = 1. |