▎ 摘　　要

NOVELTY - Preparing graphene/iron oxide/tin dioxide composite material involves synthesizing oxidized graphite by using improved hummers method. The oxidized graphite, ferric chloride and urea in certain molar ratio of stirred and dissolved in deionized water, and ultrasonic dispersed for some time. The dispersion is heated in a stainless steel autoclave at 100-150 degrees C for 3-6 hours, and cooled to room temperature. USE - Method for preparing graphene/iron oxide/tin dioxide composite material (claimed). ADVANTAGE - The method enables to prepare graphene/iron oxide/tin dioxide composite material which has excellent electrochemical performance. DETAILED DESCRIPTION - Preparing graphene/iron oxide/tin dioxide composite material involves synthesizing oxidized graphite by using improved hummers method. The oxidized graphite, ferric chloride and urea in certain molar ratio of stirred and dissolved in deionized water, and ultrasonic dispersed for some time. The dispersion is heated in a stainless steel autoclave at 100-150 degrees C for 3-6 hours, and cooled to room temperature. The SnCl22H2O solid medicine is added to the solution under water bath condition of 25-50 degrees C, stirred for a period of time, removed centrifugation, washed, dried and grounded. The solid powder obtained as dis calcined at 300-600 degrees C for 1 hour in nitrogen atmosphere or an argon atmosphere in tubular furnace.