▎ 摘　　要

NOVELTY - Preparation of cobalt-iron-carbon/reduced graphene oxide electromagnetic wave absorption composite material comprises dissolving graphene oxide in deionized water to obtain solution A, adding citrate and cobalt salt, and dissolving; adding ferricyanide to deionized water, dissolving, slowly pouring to first solution, stirring, standing in water bath, and annealing. USE - The method is for preparation of cobalt-iron-carbon/reduced graphene oxide electromagnetic wave absorption composite material. ADVANTAGE - The composite material has improved electromagnetic wave absorption performance, improved dielectric loss, conductive losses and attenuation capabilities, excellent electromagnetic wave absorption properties with only a small amount of graphene oxide, and minimum reflection loss that can reach 53.0 dB when the matching thickness is 2.4 mm. The method is simple and environment-friendly, and adjusts the dielectric constant by changing the content of graphene oxide. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a cobalt-iron-carbon/reduced graphene oxide electromagnetic wave absorption composite material comprising cobalt-iron alloy as the core, and reduced graphene supported with carbon-shelled core-shell structure cobalt-iron-carbon.