▎ 摘　　要

NOVELTY - Synthesizing ferric oxide and reduced graphene oxide by covalent coupling comprises (i) adding graphite powder and sodium nitrate slowly into the acid solution under ice-water bath conditions to obtain mixed solution A, (ii) adding potassium permanganate slowly into the mixed solution A, stirring, heating in a water bath to the set temperature to obtain mixed solution B, (ii) adding deionized water into the mixed solution B, and heating to the set temperature, (iii) adding deionized water and strong oxidizing agent into the mixed solution B, cooling to room temperature until no bubbles are generated, centrifuging, cleaning, and drying to obtain dark yellow reduced graphene oxide, (v) dispersing the reduced graphene oxide in alcohol solution, introducing polar oxygen-containing groups into the reduced graphene oxide by a flash oxidation method to obtain reduced graphene oxide in an oxygen-enriched state. USE - The ferric oxide and reduced graphene oxide composite material is useful in preparing lithium-ion battery anode materials (claimed). ADVANTAGE - The composite material: has regular appearance, high composite strength and excellent electrochemical cycle performance.