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

Disclosed is a lithium iron phosphate with 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 surface of the lithium iron phosphate by chemical bonding via a heterogeneous element other than carbon. 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).