Preparation method of lithium iron phosphate cathode material

Abstract

A preparation method of a lithium iron phosphate cathode material includes steps of (a) providing a phosphoric acid, an iron powder, a carbon source, wherein the phosphoric acid and the iron powder are reacted to produce a first product, and the first product is amorphous iron phosphate with chemical formula of a-FePO4·xH2O (x>0); (b) providing a lithium salt mixture, wherein the lithium salt mixture includes a lithium hydroxide and a lithium carbonate; (c) grinding and mixing the first product, the carbon source, and the lithium salt mixture; (d) calcining the first product and the lithium salt mixture to produce a precursor, wherein the precursor has a formula of Fe3(PO4)2·8H2O+Li3PO4; and (e) calcining the precursor and the carbon source to obtain the lithium iron phosphate cathode material.

Dependencies are inferred from the claim text.