▎ 摘　　要

NOVELTY - Preparing graded hole prussian blue nanosphere based on iodine-doped graphene involves dissolving potassium ferricyanide in deionized water, adding a surfactant, stirring until the clear solution, then adding the inorganic acid solution, heat after stirring, and first raising the temperature to 70-90 C under magnetic stirring for 22-26 hours. The temperature is lowered to room temperature. The precipitate is collected by centrifugation and washed multiple times with distilled water and ethanol and dried under vacuum at 50-70 degrees C for 10-14 hours to obtain solid iron ferricyanide nanosphere precursors. The solid iron ferricyanide nanosphere precursor is mixed with a surfactant and added to the inorganic acid solution and uniformly stirred. The temperature is raised to 120 degrees C in a sealed environment, and the reaction is continued for 4-6 hours, and then gradually cooled to room temperature to obtain iron ferricyanide nanospheres with classified pores. USE - Method for preparing graded hole prussian blue nanosphere based on iodine-doped graphene. ADVANTAGE - The method enables to prepare graded hole prussian blue nanosphere based on iodine-doped graphene that has good capacity, good stability and circulation, and the capacity maintenance rate, has simple process and convenient operation, and is suitable for large-scale industrial production. DETAILED DESCRIPTION - Preparing graded hole prussian blue nanosphere based on iodine-doped graphene involves dissolving potassium ferricyanide in deionized water, adding a surfactant, stirring until the clear solution, then adding the inorganic acid solution, heat after stirring, and first raising the temperature to 70-90 C under magnetic stirring for 22-26 hours. The temperature is lowered to room temperature. The precipitate is collected by centrifugation and washed multiple times with distilled water and ethanol and dried under vacuum at 50-70 degrees C for 10-14 hours to obtain solid iron ferricyanide nanosphere precursors. The solid iron ferricyanide nanosphere precursor is mixed with a surfactant and added to the inorganic acid solution and uniformly stirred. The temperature is raised to 120 degrees C in a sealed environment, and the reaction is continued for 4-6 hours, and then gradually cooled to room temperature to obtain iron ferricyanide nanospheres with classified pores. The iodine-doped graphene and the iron ferricyanide nanospheres are added with graded pores prepared above to ionic water and ultrasonically for 1-2 hours, and freeze-dried for 46-50 hours to obtain the graded-pore iron ferricyanide nanospheres wrapped by the iodine-doped graphene.