High-performance electromagnetic wave absorption in FeS/SnS@multi-walled carbon nanotube composites with honeycomb-shaped structure

In this work, we synthesized composites of ferrous disulfide and tin disulfide with multi-walled carbon nanotubes (MWCNTs) using a straightforward hydrothermal method. The incorporation of carbon nanotubes significantly enhanced the dielectric loss capability of the composites. When the filling ratio of FeS 2 /SnS 2 @CNTs (20 wt%) in paraffin was 40%, the effective absorption bandwidth was 3.28 GHz, while the minimum reflection loss (RL) value was as high as −39.2 dB, which corresponded to a thickness of only 1.4 mm. This work reveals the potential research value of this material in terms of thin thickness, strong absorption and light mass. The honeycomb structure increases the reflection and scattering of electromagnetic waves. Various polarization and defects enhance the microwave absorption performance of the material.