METHOD OF MANUFACTURING LIFEPO4 FOR LITHIUM SECONDARY BATTERY CATHODE MATERIAL BY USING HYDROTHERMAL SYNTHESIS

摘要

PURPOSE: A manufacturing method of LiFePO4 for lithium secondary battery positive electrode material is provided to control the shape of particle to the shape in which lithium ions are easily inserted or extracted, by controlling the concentration and pH of starting material, thereby improving conductivity. CONSTITUTION: A manufacturing method of LiFePO4 for lithium secondary battery positive electrode material comprises: lithium acetate, iron sulfate and ammonium dihydrogen phosphate into distilled water; a step of mixing the solution in container; a step of adding pH modifier for controlling the pH of the mixed solution; and a step of putting the mixed solution into hydrothermal synthesizer, and then hydrothermal synthesizing the same. The molar ratio of the lithium acetate, iron sulfate and ammonium dihydrogen phosphate dissolved into the distilled water is 1-3:1:1.