Cathode active material for lithium secondary battery and lithium secondary battery including the same

A method for manufacturing a cathode active material for a lithium secondary battery, comprising:

• mixing lithium-transition metal composite oxide particles and a metal oxide to form a pre-coating on a surface of each of the lithium-transition metal composite oxide particles;
• mixing the lithium-transition metal composite oxide particles having the pre-coating thereon and an aqueous solution of a sulfur-containing compound to form a mixture;
• and
• performing a calcination of the mixture to form a coating that comprises a lithium-sulfur compound and a metal hydroxide on the surface of the lithium-transition metal composite oxide particles, wherein the lithium-sulfur compound includes at least one selected from the group consisting of lithium sulfate (Li2SO4), lithium sulfate monohydrate (Li2SO4·H2O), lithium ammonium sulfate (Li(NH4) SO4), lithium hydroxylammonium sulfate (Li(NH3)(OH) SO4), lithium fluorosulfate (LiSO3F), lithium hydrogen sulfate (LiHSO4) and lithium sulfide (Li2S).