▎ 摘　　要

NOVELTY - Ferrous disulfide based graphene oxide composite material comprises graphene oxide composite material, which is dispersed between iron disulfide ball to form graphene oxide with channel, where diameter of iron bisulfide is not greater than 3 microns. USE - Ferrous disulfide based graphene oxide composite material for sodium ion cathode battery material. ADVANTAGE - The ferrous disulfide based graphene oxide composite material for sodium ion cathode battery material improves the conductivity of the material, buffer disulfide volume expansion in the charging and discharging process, and iron material as circulation stability of the sodium ion electrode. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing ferrous disulfide based graphene oxide composite material, which involves: (A) adding grapheme oxide to the mixture of ethylene glycol and N,N-dimethylformamide; (B) stirring through ultrasonically for 4-8 hours to obtain graphene oxide dispersed mixed liquid; (C) stirring at the speed of 200-400 revolution per minute for 10-30 minutes; (D) adding sublimed sulfur and urea in mass ratio of 1.5:1; (E) stirring continuously for 200-400 revolution per minutes for 0.5-1 hours to obtain graphene oxide-iron-sulfur mixture; (F) subjecting the obtained mixture to hydrothermal reaction; (G) washing with deionized water and ethanol to remove impurities; and (H) drying to obtain ferrous disulfide based graphene oxide composite material.