MANUFACTURING METHOD OF CARBON-COATED LITHIUM IRON PHOSPHATE

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of carbon-coated lithium iron phosphate capable of securely manufacturing a lithium secondary battery exerting excellent charging/discharging characteristics.SOLUTION: The manufacturing method of carbon-coated lithium iron phosphate constituted of a carbon material and lithium iron phosphate coated with the carbon material includes: a primary sintering step (Step S103) for obtaining lithium iron phosphate by sintering a mixture of a phosphorus raw material, an iron raw material, and a lithium raw material; and a secondary sintering step (Step S108) for obtaining carbon-coated lithium iron phosphate containing the lithium iron phosphate of BET specific surface area of 3 m/g or greater by sintering a mixture of the lithium iron phosphate and the carbon raw material.SELECTED DRAWING: Figure 1