▎ 摘　　要

Great improvements for wireless techniques and electronic devices require effective electromagnetic (EM) absorbing materials to solve EM radiation and interference problems. Herein, cobalt sulfide/reduced graphene oxide (CoS/rGO) nanocomposites were prepared through a simple one-pot hydrothermal method. The microwave absorption performance of CoS/rGO nanocomposites with different rGO proportions was systematically investigated. The CoS/rGO 1:1 nanocomposite achieves the reflection loss (RL) value of -37.3dB at 8.6GHz. The effective RL values (<-10dB) of the CoS/rGO 1:1 nanocomposite are obtained in the frequency of 3.4-18GHz while the thickness varies from 2.0mm to 5.0mm. Additionally, the simulated radar cross section results indicate that the CoS/rGO nanocomposites can efficiently suppress the strong EM scattering of metal plate in different incident degrees. These achievements demonstrate that the CoS/rGO nanocomposites can be used as high-performance microwave absorbing materials.