Positive active material for rechargeable lithium battery, method for manufacturing the same, and rechargeable lithium battery including the same

A positive active material for a rechargeable lithium battery includes an olivine-type composite oxide; and a metal or an alloy thereof adhered to a surface of the olivine-type composite oxide, wherein the metal or the alloy is selected from the group consisting of germanium (Ge), zinc (Zn), gallium (Ga), and a combination thereof.