Interface engineered Mo2C high-performance electromagnetic absorption and thermal insulation

doi:10.1016/j.actphy.2026.100275

Interface engineered Mo2C high-performance electromagnetic absorption and thermal insulation

2026-07-01

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DOI：10.1016/j.actphy.2026.100275

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The escalating issue of electromagnetic (EM) pollution necessitates the development of multifunctional materials integrating efficient absorption with thermal management. Herein, we report a dual-functional design based on interface-engineered Mo2C MXenes. Through a molten-salt etching strategy, metal ions (Cu/Fe) were in-situ doped into Mo2C, constructing heterostructures that significantly enhance interfacial polarization and defect-induced dipole relaxation. The optimized Mo2C/Fe composite demonstrates exceptional EM absorption performance, achieving the reflection loss of −41.8 dB at 2.0 mm with a broad bandwidth of 5.12 GHz. This enhancement is attributed to the synergistic effect of optimized impedance matching and multi-scale polarization loss mechanisms. Furthermore, the derived Mo2C/Fe aerogel exhibits ultralow density (0.0235 g cm−3) and outstanding thermal insulation (ΔT < 20 °C at 80 °C), exhibiting superior corrosion resistance in neutral environments. This work develops a viable design strategy for advanced MXene-based composites, demonstrating their dual functionality in efficient EM absorption and effective thermal insulation.

Keywords:

Mo2C MXenes

electromagnetic absorption

thermal insulation

interface engineering

heterostructures

Interface engineered Mo2C high-performance electromagnetic absorption and thermal insulation

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