▎ 摘　　要

NOVELTY - The method comprises (1) adding iron(III) chloride hexahydrate to the aqueous dispersion of graphene oxide, and uniformly dispersing to obtain an external spinning solution, (2) adding chitosan into the solvent and dispersing uniformly to obtain the inner layer precursor spinning solution, (3) using liquid nitrogen as a collector, coaxial electrospinning-freezing casting to obtain aerogel microspheres, and (4) thermally reducing the aerogel microspheres, and cooling. USE - Method for preparing core-shell heterogeneous graphene aerogel microsphere, which is used as a microwave absorbent (claimed). ADVANTAGE - The core-shell structure can make the electromagnetic waves enter and attenuate in order; enhances impedance matching performance and electromagnetic wave reflection and scattering; brings new heterogeneous interfaces and multi-reflection channels; reduces the conductivity of the microspheres; increases the resonant cavity in the aerogel microspheres, and increases the impedance of the aerogel microspheres match performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a core-shell heterogeneous graphene aerogel microsphere.