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Electromagnetic Interference Shielding Performance of Flexible, Hydrophobic Honeycomb‐Structured Ag@Ti3C2Tx Composites

Novel honeycomb‐structured Ag@Ti3C2Tx composites are prepared by a microwave‐assisted synthesis method using polymethyl methacrylate as an expendable template. The resulting Ag@Ti3C2Tx composites retain their original spherical morphology and exhibit hydrophobic performance, low thermal conductivity, and excellent electromagnetic interference (EMI) shielding performance. Remarkably, the Ag‐1.8@Ti3C2Tx composite attains electromagnetic interference shielding performance with a maximum average shielding effectiveness of 39.36 dB in the X‐band and 43.64 dB in the Ku‐band. This outstanding performance is the result of conduction loss, interface polarization between Ag nanoparticles and Ti3C2Tx nanosheets, and multi‐reflection and scattering caused by the hollow structure in the honeycomb‐structured Ag@Ti3C2Tx composites. Overall, the honeycomb‐structured Ag@Ti3C2Tx composites possess merits such as light weight, flexibility, hydrophobicity, and EMI shielding performance, suggesting great application potential in smart electronic devices.