LITHIUM IRON PHOSPHATE INCLUDING SULFUR COMPOUNDS WITH SULFIDE BOND AND LITHIUM SECONDARY BATTERY USING THE SAME

摘要

The present invention provides a lithium iron phosphate with an olivine crystal structure, and specifically an olivine-type lithium iron phosphate wherein the lithium iron phosphate has a composition represented by the following Formula 1, sulfur compounds with a sulfide bond are included as impurities on the lithium iron phosphate particle, and the particle surface is coated with carbon (C). Li1+aFe1-xMx(PO4-b)Xb (1) (wherein M, X, a, x, and b are the same as defined in the Description).