CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND MANUFACTURING METHOD THEREFOR

摘要

The present invention relates to a cathode active material for a lithium secondary battery, which improves the rate capability of a lithium secondary battery by coating the surface of a layered lithium nickel-manganese-cobalt oxide cathode active material with fluorine and thereby forming a spinel structure on the surface, and a manufacturing method therefor. The present invention can charge a lithium secondary battery up to capacity close to full charge in a short time as compared to conventional cathode active materials, and therefore can provide a lithium secondary battery having improved rate capability, which is suitable to achieve a high-capacity secondary battery.