Preparation of RGO/Ni Nanoparticles with High-Performance Microwave Absorption

Abstract

Sensitive equipment such as electric vehicle control systems and vehicle electronics are susceptible to the external electromagnetic environment. The radiated electromagnetic signals interfere with the normal driving of electric vehicle and threaten human life. In order to ensure safety and reliability of electric vehicles, electromagnetic (EM) absorbent has become a key technology. RGO/Ni was prepared by in-situ reduction method in this paper. Since composition, size, and special morphology have a vital influence on microwave absorption properties, the as-obtained products were characterized by X-ray diffraction, scanning electron microscopy and vector network analysis. Different reduction methods will bring different dielectric properties to the obtained RGO. The RGO obtained by Zn powder have a more complete structure, and therefore better dielectric properties. The prepared RGO/Ni-2 composite possesses excellent impedance matching characteristics and electromagnetic complementary effect, which are beneficial to microwave absorption performance. In this paper, the absorption mechanism of RGO/Ni-2 is studied, which provides an effective way for the preparation of GRO/Ni, and introduces the application of RGO/Ni as a high-efficiency absorber in the field of electric vehicles.