▎ 摘　　要

NOVELTY - Graphite oxide is subjected to redox reaction in presence of gas, to obtain graphene. The obtained graphene is mixed with iron oxide nanoparticles, dissolved in organic solvent, and stirred to obtain mixture (a) of iron oxide and graphene. The obtained mixture is ultrasonically treated, carbon fiber dissolved in anhydrous ethanol is added to obtained mixture, stirred, ultrasonically treated, product is washed with water, filtered, centrifuged and dried, to obtain iron oxide/graphene/carbon fiber composite. USE - Preparation of iron oxide/carbon fiber/graphene composite material used for forming anode of lithium secondary battery. ADVANTAGE - The method efficiently and economically provides iron oxide/carbon fiber/graphene composite material which improves lithium storage capacity, conductivity and internal resistance characteristics of battery. DETAILED DESCRIPTION - Graphite oxide is subjected to redox reaction in presence of gas, to obtain graphene. The obtained graphene is mixed with iron oxide nanoparticles, dissolved in organic solvent, and stirred for 1-24 hours, to obtain mixture (a) of iron oxide and graphene. The obtained mixture is ultrasonically treated for 0.5-5 hours, carbon fiber dissolved in anhydrous ethanol is added to obtained mixture, stirred for 1-24 hours, ultrasonically treated for 0.5-5 hours, product is washed with water, filtered, centrifuged and dried at 40-100 degrees C, to obtain iron oxide/graphene/carbon fiber composite. The content of iron oxide nanoparticles and graphene is 85-90% and 0.1-1% of the total content of composite material. The content of mixture (a) is 10-15% of total content of the composite material.