▎ 摘　　要

NOVELTY - A layered reduced graphene oxide-coated sodium-vanadium phosphate nanocomposite material is prepared by dissolving 0.75-3 mmol sodium carbonate, 1-4 mmol vanadyl acetylacetonate and 1.5-6 mmol ammonium dihydrogen phosphate in deionized water, ultrasonically processing resultant solution, stirring, adding resultant light blue precursor to a reactor, hydrothermally reacting, cooling to room temperature, adding 10-30 mg graphene oxide to obtained green jelly-like gel, stirring, drying obtained homogeneous dispersion, grinding dried product and calcining. USE - Layered reduced graphene oxide-coated sodium-vanadium phosphate nanocomposite material is used as sodium ion battery cathode active material (claimed). ADVANTAGE - The layered reduced graphene oxide-coated sodium-vanadium phosphate nanocomposite material has excellent durability and cycle stability, and high rate characteristics and magnification, and is prepared by simple process. DETAILED DESCRIPTION - A layered reduced graphene oxide-coated sodium-vanadium phosphate (Na3V2(PO4)3) nanocomposite material comprises a laminar structure comprising sodium-vanadium phosphate nanoparticles and a reduced graphene oxide nanosheet layer overlapped the laminar structure. The layered reduced graphene oxide-coated sodium-vanadium phosphate nanocomposite material is prepared by dissolving 0.75-3 mmol sodium carbonate, 1-4 mmol vanadyl acetylacetonate and 1.5-6 mmol ammonium dihydrogen phosphate in deionized water, in stoichiometric ratio of 1.5:2:3, ultrasonically processing resultant solution, stirring, adding resultant light blue precursor to a reactor, hydrothermally reacting, cooling to room temperature, adding 10-30 mg graphene oxide to obtained green jelly-like gel, stirring, drying obtained homogeneous dispersion, grinding dried product and calcining. An INDEPENDENT CLAIM is included for preparation of layered reduced graphene oxide-coated sodium-vanadium phosphate nanocomposite material.