Synthesis of sandwich-like Co₁₅Fe₈₅@C/RGO multicomponent composites with tunable electromagnetic parameters and microwave absorption performance

Abstract

@C/RGO composite shows an excellent microwave absorption performance, the strongest reflection loss (RL) of the sample is up to -33.38 dB at 10.72 GHz with a matching thickness of 2.5 mm, and the effective bandwidth (RL < -10 dB) can reach 9.2 GHz (8.64-17.84 GHz). With a single thickness, such a wide absorption band is rarely reported. Their excellent performance can be ascribed to the synergetic effect of the chemical composition and unique sandwich-like structures, which will improve impendence matching and strong microwave attenuation constants of the composites. Our results provide a facile strategy for tuning the electromagnetic parameters and microwave absorption properties of magnetic metal/carbon hybrid structures.