Anchoring nanoflower-like NiCoMoS on hierarchical MXene for enhanced electromagnetic wave absorption by the synergy of multiple losses mechanisms

MXene with brilliant conductivity, adjustable electromagnetic parameters and impressive electromagnetic wave (EMW) dissipation capacity has aroused considerable interest in EMW absorption field. Nevertheless, the poor EMW absorption performance caused by the serious impedance mismatching severely constrains its application in practice. In this regard, the NiCoMoS/MXene hybrids with abundant heterointerfaces were constructed through a facile electrostatic self-assembly strategy. The integration of NiCoMoS and MXene not only remarkably improves impedance matching, but also dramatically enhances the interfacial polarization. The synergistic effect of improved impedance matching and strong attenuation capacity originated from multiple loss mechanisms endows the resultant hybrids with outstanding EMW absorption performance. The NCMM3 hybrid realizes an optimal reflection loss of −56.4 dB at 12.66 GHz under a thin thickness of only 2.61 mm and a wide effective absorption bandwidth of 8.2 GHz (9.8–18.0 GHz), covering the majority of X band and the whole Ku band. Additionally, the remarkable stealth performance of the prepared NCMM hybrids used in practice is intuitively confirmed by the radar-scattering cross section simulation. This work provides a reliable approach for designing and fabricating highly efficient MXene-based EMW absorption materials with multiple components and ingenious structure.