▎ 摘　　要

High performance, low density and easy preparation are desirable attributes of electromagnetic wave absorption materials. In this study, we prepared graphene flakes containing ellipsoid like magnetic Ni, Fe and NiFe-nanoparticles in a one-step electrochemical deposition process. The synthesized nanoparticles presenting a superparamagnetic-like response. The saturation magnetization of the Gr/Ni, Gr/Fe, and Gr/NiFe hybrid nanocomposites was 4.4, 371.7, and 546.8 kA/m, respectively, and a coercivity of 1454, 3500, and 2000 A/m, respectively. The total Electromagnetic shielding of these fabricated composites reached 25, 20, and 18.5 dB, in the X band. In the Gr/NiFe nano-composites, the improvement in microwave screening is due to high saturation magnetization and small coercivity of magnetic filler, and higher ac conductivity.