CARBON-COATED LITHIUM IRON PHOSPHATE WITH OLIVINE CRYSTAL STRUCTURE AND LITHIUM SECONDARY BATTERY USING THE SAME

Disclosed is lithium iron phosphate having an olivine crystal structure, wherein the lithium iron phosphate has a composition represented by the following Formula 1 and carbon (C) is coated on the particle surface of the lithium iron phosphate containing a predetermined amount of sulfur (S). Li 1+a Fe 1-x M x (PO 4-b )X b (1) (wherein M, X, a, x, and b are the same as defined in the specification).