Preparation of olivine Li Fe PO4 cathode materials for lithium batteries via a solution method

摘要

A preparation method of olivine Li_1+xFe_1+yPO₄ is disclosed, wherein -0.2<=x<=0.2 and -0.2<=y<=0.2, which includes the following steps: (A) adding iron powder, lithium salt, and phosphate into an acid solution to form a mixture, wherein the molar ratio of Li⁺:Fe²⁺:PO₄^3- is 1+x:1+y:y; (B) stirring the mixture; (C) drying the mixture to obtain solid precursor powder; and (D) heating the precursor solid powder at a temperature over 500° C. to form olivine structured powders.