| abstract |
The present invention relates to a method for producing a positive electrode capable of stabilizing the surface of a positive electrode active material while replacing high voltage activation treatment for a positive electrode active material represented by the following formula 1, a positive electrode prepared by the method, and a lithium secondary battery comprising the same . [Chemical Formula 1] Li (Li x M y - y ' M' y ' ) O 2 - z A z Wherein M is at least one element selected from the group consisting of Mn, Ni, Co, Fe, Cr, V, Cu, Zn, Ti, M 'is at least one element selected from the group consisting of Al, Mg and B, and A is at least one element selected from the group consisting of F, S and N .) According to the present invention, in the mixing process of the positive electrode active material slurry, chemical activation is performed on the positive electrode active material represented by the above formula (1) so that the high voltage activation process can be omitted, and a silane coupling agent It is possible to stabilize the surface of the positive electrode active material and reduce the interfacial reactivity with the electrolytic solution, thereby preventing deterioration of the service life of the battery. |