Synthesis of nitrogen-doped polyaniline-derived carbon/Ni3Fe nanocomposites as high-performance microwave absorbers

Polyaniline-derived carbon (PDC) and Ni3Fe composites for electromagnetic wave (EMW) absorption were prepared through in-situ polymerization and carbonization. Using polyaniline as carbon source not only realized the doping of carbon with nitrogen, but also allowed homogeneous dispersion of Ni3Fe nanoparticles to achieve multiple reflection interfaces. The content of Ni3Fe can be used to control the impedance matching of the composites, while the dual loss mechanism of dielectric loss and magnetic loss was realized to promote EMW absorption performance. The polyaniline-derived carbon/Ni3Fe (PDC/Ni3Fe) nanocomposite with optimized composition had a minimum reflection loss (RL) of - 80.91 dB. A maximum effective bandwidth of 6.10 GHz (11.90 -18.00 GHz) was achieved, while the thickness is 2.12 mm. (c) 2022 Published by Elsevier B.V.