Reduced graphene Oxide-Ni@Multiscale carbon nanofibers with Core-Shell porous structure for microwave absorption performance

Microwave absorbing materials is an important area of research in the field of electromagnetic protection. In particular, the organic combination of composition and structure is a practical approach to improving the performance of microwave absorbing materials. In this study, Ni@polyacrylonitrile nanofibres were coated with graphene oxide@polyacrylonitrile fibres using electrostatic spinning technology to obtain core–shell porous structure reduced graphene oxide-Ni@multiscale carbon nanofibres (rGO-Ni@MCNF). The advantages of the core–shell porous structure and composition were fully exploited, and the organic combination of the two resulted in excellent microwave absorption properties of rGO-Ni@MCNF. The minimum reflection loss is −54.16 dB at 16.8 GHz, and the effective absorption bandwidth reaches 9.71 GHz at a thickness of 3.29 mm. rGO-Ni@MCNFs also exhibit high moisture resistance and thermal infrared stealth properties. These results indicate that rGO-Ni@MCNFs are of great value in the synthesis and application of microwave absorbing materials.