METHOD FOR PRODUCING LITHIUM IRON PHOSPHATE PRECURSOR BY USING RETIRED LITHIUM IRON PHOSPHATE BATTERY AS RAW MATERIAL

Some embodiments of this application provide a method for producing a lithium iron phosphate precursor by using a retired lithium iron phosphate battery as a raw material, including steps such as soaking a battery cell in acid, performing electrolysis to reclaim copper, oxidizing ferrous iron, precipitating iron phosphate, and precipitating lithium carbonate. Based on the method provided in some embodiments of this application, an iron phosphate and lithium carbonate mixture that has relatively low impurity content can be obtained in one step and used as a lithium iron phosphate precursor to prepare a lithium iron phosphate material.