▎ 摘　　要

NOVELTY - The preparation method of spider-like graphene-coated beta -iron(III) oxide-hydroxide nanorod aggregate involves dispersing graphene oxide in deionized water to obtain graphene oxide solution and then placing in an ultrasonic generator and uniformly dispersing graphene oxide to obtain suspension (A), adding analytically pure iron(III) chloride hexahydrate and sodium nitrate to deionized water and stirring, then adding mixed solution of iron salt and graphene oxide, placing the mixed solution in an ultrasonic generator and dispersing to obtain suspension (B) and naturally cooling. USE - The method is useful for preparing spider-like graphene-coated beta -iron(III) oxide-hydroxide nanorod aggregate, which is useful as cathode material for lithium ion battery. ADVANTAGE - The method enables preparation of spider-like graphene-coated beta -iron(III) oxide-hydroxide nanorod aggregate with excellent capability, conductivity and cycle stability. DETAILED DESCRIPTION - The preparation method of spider-like graphene-coated beta -iron(III) oxide-hydroxide nanorod aggregate involves dispersing graphene oxide in 25-40 ml deionized water to obtain 1-5 mg/ml graphene oxide solution and then placing in an ultrasonic generator and uniformly dispersing graphene oxide to obtain suspension (A), adding analytically pure iron(III) chloride hexahydrate and sodium nitrate to 10-25 ml deionized water and stirring, then adding mixed solution of 0.05-0.5 mol/l iron salt and graphene oxide, placing the mixed solution in an ultrasonic generator and dispersing to obtain suspension (B), adding suspension (B) to a homogeneous hydrothermal reaction kettle, sealing the reaction kettle, carrying out hydrothermal reaction at 50-150 degrees C, naturally cooling to room temperature to obtain product (C), washing the product (C) with water and alcohol, dispersing the washed product in water to obtain sample product (D), freeze-drying the sample product (D) at temperature of -20 degrees C to -50 degrees C and vacuum degree of 10-60 Pa and drying.