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

• Published in: Journal of materials science & technology Vol. 113; pp. 128 - 137
• Main Authors: Sun, Chunhua, Jia, Zirui, Xu, Shuang, Hu, Dongqi, Zhang, Chuanhui, Wu, Guanglei
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 20.06.2022
• Subjects: CeO2; Electromagnetic wave absorption; Synergistic loss; Ti3C2Tx; CeO2; Electromagnetic wave absorption; Synergistic loss; Ti3C2Tx
• ISSN: 1005-0302; 1941-1162
• DOI: 10.1016/j.jmst.2021.11.006

•NiCo/CeO2/Ti3C2Tx composites with multilayer structure were prepared.•The effective bandwidth of the composite is up to 6.32 GHz at 1.9 mm.•The modulation of electromagnetic parameters was achieved by controlling the amount of Ce3+ introduced.•The mechanism of wave absorption of composite materials is explored and explained in depth. 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 Ti3C2Tx MXene based absorption materials. In this work, a series of loosely packed accordion-like 3D NiCo/CeO2/Ti3C2Tx with tunable and high-efficient EMW absorption were fabricated by introducing self-assembled NiCo alloys on the surface of Ti3C2Tx and subsequent anchoring of CeO2. On the one hand, the magnetic NiCo particles and highly conductive Ti3C2Tx achieved the dielectric-magnetic dual-loss. On the other hand, the triple interfacial polarization among NiCo/CeO2/Ti3C2Tx further 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/CeO2/Ti3C2Tx-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 dB at 2.0 mm. This work putted forward a new synergistic regulation strategy of dielectric-magnetic 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.