▎ 摘　　要

NOVELTY - Mixed polyanionic sodium ion battery anode material comprises sodium iron phosphate (Na3Fe2(PO4)(P2O7) particles supported on the graphene layer in situ. USE - Used as mixed polyanionic sodium ion battery anode material. ADVANTAGE - The material has good stability with large magnification and rich raw materials and is cheap. The method is simple and easy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the Mixed polyanionic sodium ion battery anode material, comprising (i) dissolving iron nitrate nonahydrate solid dissolved in deionized water, adding oxalic acid, sodium acetate and ammonium dihydrogen phosphate, and stirring until completely dissolved; (ii) drying the mixed solution obtained in step (i), and obtaining precursor; and (iii) placing the precursor obtained in step (ii) under argon-hydrogen atmosphere and calcining to obtain target product