Enhanced microwave absorption from the magnetic-dielectric interface: A hybrid rGO@Ni-doped-MoS2

Abstract Impedance matching has a key role in strong microwave absorption. To achieve the perfect impedance matching and enhanced interface dielectric relaxation, nickel-doped rGO@MoS2 composite has been prepared. The complex permittivity and complex permeability of rGO@Ni-MoS2 show significant improvement by the combination of the high magnetocrystalline anisotropy of Ni metal with highly conductive reduced graphene oxide, leading to remarkable microwave absorption. The prepared rGO@Ni-MoS2 achieved maximum microwave absorption of −40 dB at 2 mm thickness. The control samples of MoS2, Ni-MoS2 and rGO@MoS2 indicate that micro-cluster of MoS2 and Ni doping is indeed helpful to improve the performance of rGO@Ni-MoS2. The study provides a pathway for practical applications of microwave absorption materials in terms of impedance matching.