▎ 摘　　要

NOVELTY - Anion and cation functional doping modified high-entropy polyanionic anode material comprises anode core and carbon coating layer. The anode core is sodium-metal-complex. The particle size of the high-entropy polyanion anode material is 10-40 μm, and the thickness of the carbon coating layer is 5-10 nm. USE - The anion and cation functional doping modified high-entropy polyanionic anode material is useful for sodium ion battery (claimed). ADVANTAGE - The anion and cation functional doping modified high-entropy polyanionic anode material: controls normalized growth and directional construction of crystal phase to realize synergistic control of cost, voltage capacity and conductivity. DETAILED DESCRIPTION - Detailed Description: Anion and cation functional doping modified high-entropy polyanionic anode material comprises anode core and carbon coating layer. The anode core is sodium-metal-complex of formula (NaδAαBβCγXσYmZn)(I). The particle size of the high-entropy polyanion anode material is 10-40 μm, and the thickness of the carbon coating layer is 5-10 nm. A = V3+and/or Fe2+; B = Cu2+, Mn2+and/or Cr3+; C = Ni2+and/or Ti4+; X = PO43-and/or P2O74-; Y = SO42-, N3-and F-; Z = BO33-, SiO44-, S2-and/or Cl-; δ = 1.2-4.8; α = 0.7-1.4; β = 0.16-0.75; γ = 0.3-0.8; σ = 2.1-2.8; m = 0.15-0.75; and n = 0.15-0.6. An INDEPENDENT CLAIM is included for preparation of anion and cation functional doping modified high-entropy polyanionic anode material. The method utilizes sodium source, transition metal A source, transition metal B source, transition metal C source, polyanion X source, polyanion Y source, polyanion Z source, carbon source and volatile solvent.