Integrating Sulfur Doping with a Multi‐Heterointerface Fe7S8/NiS@C Composite for Wideband Microwave Absorption

• DOI: 10.1002/smll.202401618
• Publication Date: 2024-05-07T08:10:26Z
• Authors: Yikun Chen; Yan Wang; Chenchen Li; Wei Wang; Xu Xue; Hongge Pan; Renchao Che
• Keywords: Reflection loss

Abstract Heterointerface engineering is presently considered a valuable strategy for enhancing the microwave absorption (MA) properties of materials via compositional modification and structural design. In this study, sulfur‐doped multi‐interfacial composite (Fe 7 S 8 /NiS@C) coated with NiFe‐layered double hydroxides (LDHs) successfully prepared using hydrothermal method post‐high‐temperature vulcanization. When assembled into twisted surfaces, NiFe‐LDH nanosheets exhibit porous morphologies, improving impedance matching, scattering. Sulfur doping in composites generates heterointerfaces, numerous sulfur vacancies, lattice defects, which facilitate polarization process to enhance MA. Owing controllable heterointerface design, unique structure induced multiple endowing Fe /NiS@C an enhanced MA capability. particular, minimum reflection loss (RL min ) value reached −58.1 dB at 15.8 GHz thickness 2.1 mm, broad effective bandwidth (EAB) 7.3 achieved 2.5 mm. Therefore, exhibits remarkable potential as high‐efficiency material owing synergistic effects processes, scatterings, structures, matching.