PREPARATION METHOD FOR OLIVINE TYPE CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY USING THE SAME

摘要

The present invention relates to a method for preparing an olivine type cathode active material for a lithium secondary battery, and a lithium secondary battery using the same. The method for preparing an olivine type cathode active material for a lithium secondary battery of the present invention comprises: (S1) a step of preparing a specific manganese phosphate or phosphate iron manganese hydrate by coprecipitation; (S2) a step of press-molding a mixture comprising the manganese phosphate or manganese iron phosphate hydrate, lithium compound, and a carbon material to prepare a plasticizing precursor; and (S3) a step of plasticizing the plasticizing precursor. The preparation method of the present invention has an excellent reproducibility, and the cathode active material prepared has an improved capacity.