▎ 摘　　要

NOVELTY - Modified anode material comprises an iron-based polyanionic compound surface loaded with graphene. USE - The modified anode material is useful in sodium ion batteries. ADVANTAGE - The modified anode material has high electronic conductivity, reversible discharge capacity, energy density and reversible capacity thus promotes the further development of sodium ion batteries. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing modified anode material, comprising (i) dissolving the iron source, manganese source, sodium source, phosphorus source and reducing agent in water to obtain mixed solution A; (ii) dissolving the graphene oxide in water to obtain mixed solution B; and (iii) dropping the mixed solution B into the mixed solution A, stirring, drying and calcining.