▎ 摘　　要

NOVELTY - A sodium vanadium fluorophosphate/graphene composite material which has porous submicron sphere structure. The porous submicron sphere structure has multiple nanosheets with pores in between. USE - The sodium vanadium fluorophosphate/graphene composite material is used for anode material of sodium ion battery (claimed). ADVANTAGE - The material has stable structure. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) preparation of the composite material comprising dispersing graphene oxide in deionized water to obtain graphene oxide aqueous solution; mixing trivalent vanadium compound, phosphoric acid/phosphoric acid compound, sodium fluoride, ethanol and acetone, adding graphene oxide aqueous solution, putting to autoclave, hydrothermally reacting at 120wt.%, and sequentially washing, centrifuging and drying; and (2) preparation of the sodium ion battery comprising adding conductive agent acetylene black to sodium vanadium fluorophosphate/graphene composite material, adding polyvinylidene fluoride binder to obtain sodium ion battery electrode, and assembling into button cells together with sodium sheets, electrolytes and separators.