▎ 摘　　要

NOVELTY - Ferric fluoride composite cathode material comprises fluorinated graphene and iron fluoride porous micro-nanospheres nucleated at the defect positions of the fluorinated graphene. The chemical composition of the porous iron fluoride micronano ball comprises ferrous fluoride and ferric fluoride. USE - Ferric fluoride composite cathode material used in sodium ion battery (claimed). ADVANTAGE - The ferric fluoride composite cathode material introduces fluorinated graphene with high conductivity and iron fluoride material into the iron fluoride composite positive electrode material to solve the problem of poor conductivity and has excellent electrochemical performance. The ferrous fluoride and ferric fluoride are small in size and have high specific surface area and pore volume, which can increase the contact area between the ferric fluoride composite cathode material and the electrolyte and increase the electrochemical activity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing ferric fluoride composite cathode material, which involves mixing the dispersion liquid of graphene oxide with hydrofluoric acid, and performing an acid-thermal reaction to obtain fluorinated graphene, mixing the fluorinated graphene, water-soluble ferric salt, hydrofluoric acid and a dispersant , performing a solvothermal reaction to obtain a precursor, calcining the precursor in a protective atmosphere to obtain an iron fluoride composite positive electrode material.