POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR MANUFACTURING THE SAME AND LITHIUM SECONDARY BATTERY USING THE SAME

摘要

The present invention relates to a positive active material for a lithium secondary battery, a method for manufacturing same, and a lithium secondary battery using same. According to the present invention, a mixed Mn-based positive active material for a lithium secondary battery having a bimodal particle size distribution can be provided. Also, a method for manufacturing a mixed Mn-based positive active material for a lithium secondary battery including a first step for mixing a large stone manganese compound (A) with a particle diameter of 5 to 25 mm with a small stone manganese compound (B) with a particle diameter of 0.3 to 3 mm; a second step for mixing the mixture of the large stone manganese compound (A) and the small stone manganese compound (B) with a lithium compound and an additive; a third step for plasticizing the mixture of the large stone manganese compound (A), the small stone manganese compound (B), the lithium compound, and the additive; and a fourth step for pulverizing the plasticized mixture can be provided.