▎ 摘　　要

NOVELTY - Composite material comprises a graphene-coated zinc oxide nanosphere core-shell structure composite material. USE - The composite material is used as a microwave absorbing material (claimed). ADVANTAGE - The composite material has improved electromagnetic property, impedance matching, and effective absorption bandwidth. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the composite material comprising mixing a graphene oxide or N,N-dimethylformamide dispersion liquid and a divalent zinc salt solution using N,N-dimethylformamide as a solvent, and subjecting to a water bath reaction to obtain the composite material.