LiFePO4 electrode materials are mainly used in various lithium-ion batteries. Since NTT of Japan first exposed the olivine structure cathode material of aympo4 (a is alkali metal, M is CoFe: lifecopo4) in 1996, John. B. goodenough and other research groups of Texas State University in the United States also reported the reversible migration of LiFePO4 into and out of lithium in 1997, This material has attracted great attention, and caused extensive research and rapid development. Compared with the traditional cathode materials of lithium-ion secondary batteries, LiMn2O4 with spinel structure and LiCoO2 with layered structure, the raw materials of limpo4 are more extensive, cheaper and environmentally friendly.