▎ 摘　　要

NOVELTY - The method involves dispersing graphite oxide ultrasonically in water to form grapheme oxide solution that is evenly dispersed by a single layer. Iron salt solution is added into the obtained grapheme oxide solution. Aqueous alkali is added and mixed evenly in the grapheme oxide solution. The mixed liquid is transferred to a reactor to perform a hydro-thermal reaction. The obtained product is cleaned and dried to obtain a graphene nanometer iron oxide composite electrode material. USE - Graphene nanometer iron oxide composite electrode material preparation method for lithium ion battery. ADVANTAGE - The method enables providing simple and secure preparation process. The prepared graphene nanometer iron oxide composite material has better structure stability, multiplying power performance, cyclic service life and monodispersity. The charging/discharging capacity of the prepared graphene nanometer iron oxide composite material is more than 1000 mAh/g, when the graphene nanometer iron oxide composite material is used as electrode material of the lithium ion battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene nanometer iron oxide composite electrode material. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a graphene nanometer iron oxide composite electrode material.