METHOD FOR MANUFACTURING CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY

摘要

The present invention relates to a method for manufacturing a cathode active material for a lithium secondary battery and, more particularly, to a method for manufacturing a cathode active material for a lithium secondary battery, comprising: generating manganese complex deposit by restoring and depositing manganese and heterogeneous metal elements from a mixed solution containing a manganese compound and a heterogeneous metal element compound; and generating lithium manganese complex oxide by mixing the manganese complex deposit with a lithium-contained metal compound and firing the mixture at 400 to 750 ºC. According to the present invention, a cathode active material for a lithium secondary battery in which vanadium is effectively doped into lithium manganese complex oxide can be manufactured, and the use thereof enables the production of a lithium secondary battery having improved capacity and remarkably improved charging and discharging efficiency.