▎ 摘　　要

NOVELTY - Preparing vanadium-tungsten double-metal selenide material, comprises (i) adding the metal salt and the oxidation graphene deionized water, ultrasonically dissolving for 0.5-1 hour at 10-50℃ to obtain the product A, (ii) adding the melamine into the deionized water, placing into the oil bath pot and stirring to 60-80℃, adding formaldehyde solution to obtain the product B, and (iii) adding the product A into the product B, stirring for 12-24 hours at 10-50℃, filtering, washing, freezing and drying to obtain the graphene tungsten salt precursor of graphite alkenyl, and carrying out selenizing annealing treatment under the inert gas. USE - Preparing vanadium-tungsten double-metal selenide material for sodium ion battery used as rechargeable secondary battery for storing new energy e.g. solar energy, wind energy and hydrogen energy. ADVANTAGE - The method enables to prepare vanadium-tungsten double-metal selenide material, which provides rich active sites for reaction. The built-in electric field formed in the interface effectively enhances the dynamic performance of the battery, and exhibits a higher capacity and excellent multiplying power performance, and has potential in the sodium storage performance.