Synergistic regulation of dielectric-magnetic dual-loss and triple heterointerface polarization via magnetic MXene for high-performance electromagnetic wave absorption

The single dielectric/magnetic loss mechanism and invalid polarization loss are the crucial issues which limit the exploitation of multi-component electromagnetic wave(EMW) absorption materials, especially TiCTMXene based absorption materials. In this work, a series of loosely packed accordion-like 3D NiCo/CeO/TiCTwith tunable and high-efficient EMW absorption were fabricated by introducing selfassembled Ni Co alloys on the surface of TiCTand subsequent anchoring of CeO. On the one hand, the magnetic NiCo particles and highly conductive TiCTachieved the dielectric-magnetic dual-loss. On the other hand, the triple interfacial polarization among NiCo/CeO/TiCTfurther enhanced the relaxation loss. In addition, the effects of cerium ions on tuning the compositional structure, electromagnetic parameters and impedance behavior of the composites are explored. The NiCo/CeO/TiCT-0.1 performed a wide absorption bandwidth of 6.32 GHz at 1.9 mm, as well as, the minimum reflection loss value of -42.48 d B at 2.0 mm. This work putted forward a new synergistic regulation strategy of dielectricmagnetic dual-loss and triple heterointerface polarization via magnetic MXene for high-performance EMW absorption, which may shed new light on the fabrication of multiple-component synergistic loss absorption materials.