Preparation method of antimony vanadate and graphene composite material

The invention discloses a preparation method of an antimony vanadate and graphene composite material. The preparation method comprises the following steps: reducing graphene oxide, ammonium metavanadate and antimony trichloride, synthesizing uniformly dispersed antimony vanadate nanoparticles on the reduced graphene oxide nanosheet by a one-step solvothermal method, and coating the antimony vanadate nanoparticles with the reduced graphene oxide, and forming the antimony vanadate and graphene composite material with the sandwich-shaped nano-structure. The antimony vanadate and graphene negativeelectrode material shows excellent electrochemical properties as a negative electrode of a potassium ion battery: a) high capacity; b) high rate capability; c) good cycle performance. 本发明公开了一种钒酸锑及石墨烯复合材料的制备方法，通过还原氧化石墨烯、偏钒酸铵和三氯化锑，一步溶剂热法合成在还原的氧化石墨烯纳米片上制备了均匀分散钒酸锑纳米颗粒，钒酸锑纳米颗粒被还原氧化石墨烯包覆，形成三明治状纳米结构的钒酸锑及石墨烯复合材料。本发明提供的钒酸锑及石墨烯负极材料作为钾离子电池的负极表现出优异的电化学性能：a)高容量；b)高倍率性能c)循环性能好。