▎ 摘　　要

NOVELTY - Preparing carbon-coated zinc ferrite/graphene composite anode material involves dissolving the sugar in deionized water to obtain a sugar solution having a concentration of 0.2-2 mole per liter. The sugar solution is placed in a hydrothermal kettle, heated at 140-200 degrees C for 2-10 hours. The reaction is centrifuged, washed alternately with ethanol and deionized water for 4 times, and dried to obtain carbon particle powder. The obtained carbon particle powder is added to an ethanol solution, ultrasonically dispersed, and stirred to obtain a carbon particle-ethanol dispersion. The zinc salt and the iron salt are dissolved in ethanol, and then added dropwise to the carbon particle-ethanol dispersion, and performed magnetic stirring for 0.1-10 hours to obtain a first mixed dispersion. The base ethanol solution is slowly added dropwise to the first mixed dispersion, magnetically stirred for 2 hours, centrifuged, washed with water and lyophilized to obtain a powder. USE - Method for preparing carbon-coated zinc ferrite/graphene composite anode material. ADVANTAGE - The method enables to prepare carbon-coated zinc ferrite/graphene composite anode material which has excellent rate performanceand cycle performance. DETAILED DESCRIPTION - The obtained powder is placed in a tube furnace and calcined at 200-800 degrees C for 0.5-5 hours to obtain zinc ferrite powder. The molar ratio of zinc and iron in the zinc salt and the iron salt is 1.5:2. The molar ratio of zinc salt and base is 1.5:9 to obtain zinc ferrite powder which is ultrasonically dispersed in deionized water, followed by adding an anionic polyelectrolyte, and magnetically stirring for 0.1-10 hours to obtain a mixed dispersion of zinc ferrite and an anionic polyelectrolyte, then dispersing the graphite oxide powder ultrasonically, after ionic water to obtain aqueous dispersion of graphene oxide. The aqueous dispersion of graphene oxide is added to a mixed dispersion of zinc ferrite and an anionic polyelectrolyte, and magnetic stirring is continued for 0.1-10 hours to obtain a second mixture. The obtained sample is freeze-dried to obtain second mixed dispersion which is placed in a tube furnace, and calcined at 200-800 degrees C for 0.5-5 hours to obtain a carbon-coated zinc ferrite/graphene composite anode material. The mass ratio of zinc ferrite and anionic polyelectrolyte is 1: (0.1-2). The mass ratio of the zinc ferrite and graphite oxide is 1:(0.1-2).