Trans‐Electromagnetic and Optical, Multi‐Spectrum Compatible Defense of Ti ₃ C ₂ T _x /RGO/ZIF‐67(Co) Composite Aerogel

Abstract The compatible defense across electromagnetic and optical bands is extremely challenging for the development of stealth materials. Herein, adopting material selection and structural design strategy, an integral Ti 3 C 2 T x (MXene)/reduced graphene oxide (RGO)/ZIF‐67(Co) composite aerogel with microwave/terahertz absorption module, infrared camouflage module, and visible absorption module is constructed, which first enables ultra‐wideband compatible defense across the electromagnetic and optical spectrum. The high reflection loss (−55.97 dB) in the S, C, X, and Ku bands, and excellent shielding/absorption performance (69.5 dB/69.3 dB) in the 0.1–2.0 terahertz bands can be achieved. The average visible spectrum absorption of >97.3% greatly reduces visible signature signals, ensuring indistinguishability from visible imaging equipment. The thermal infrared camouflage function reduces the temperature difference between the target and the background, realizing target concealment. This work will provide an effective approach to building advanced and versatile ultra‐multi‐spectrum‐compatible defense systems.