MANUFACTURING METHOD FOR CATHODE ACTIVE MATERIAL FOR LITHIUM SECOND BATTERY

摘要

The present invention relates to a manufacturing method of a cathode active material for a lithium secondary battery. Disclosed is a manufacturing method of a cathode active material for a lithium secondary battery, which comprises (a) a step of manufacturing a mixture solution by mixing a reduced graphite oxide (RGO) solution and a manganese salt; (b) a step of manufacturing a manganese oxide/graphene nano-composite by maintaining the mixture solution at a constant temperature; (c) a step of manufacturing a precursor solution by mixing the manganese oxide/graphene nano-composite solution, a lithium salt and phosphate so that the lithium salt becomes 2-3 times of the manganese oxide or the phosphate with regard to the mole ratio; (d) a step of manufacturing a lithium manganese phosphate/graphene nano-composite by firstly processing the precursor solution with heat; and (e) a step of secondly processing with heat at a temperature range of 600-700°C under a reduction atmosphere.