Dual-Regulation of Magnetization and Multi-interfacial Strategies in Mxene/CoNiM-800（M=Fe/Cu/Mn/Zn） Hierarchical Structures for Synergistic Microwave Absorption

Abstract

Mxene is widely regarded as a potential electromagnetic wave absorption (EMA) material due to its good electrical conductivity properties and multilayer structure. However, this characteristic typically results in suboptimal impedance matching conditions. Introducing magnetic components can effectively optimize its impedance matching performance. Multi-interfaces can significantly enhance the interfacial polarization and thus the dielectric loss of composites. Herein, starting from the dielectric-magnetic synergy and multi-interfacial strategy, Layered double hydroxides (LDH) nanosheets are successfully in-situ grew on the surface and interlayer of Mxene. Furthermore, based on the CoNi-LDH nanosheet, the adjacent third element (Fe/Cu/Mn/Zn) is introduced into magnetic CoNi alloy to modulate the magnetic responsiveness and interfacial components. The dielectric-magnetic synergy and multiple interfaces combine to promote excellent EMA performance with a minimum reflection loss (RLmin) of -57.63 dB at 1.44 mm.