Tunable MXene Surface Mediates Concurrent All‐printed Ultrawideband Metasurface Absorbers and Anti‐/deicing

ABSTRACT Icing on high‐altitude stealth vehicles critically compromises flight safety and radar stealth performance, necessitating multifunctional materials that integrate broadband electromagnetic absorption and reliable electrothermal de‐icing. Herein, we report a 2D material surface and metasurface structural co‐design where covalent macromolecular grafting is employed to fundamentally enhance the oxidation resistance and environmental stability of MXene. Ingeniously, the inherent drawback of reduced conductivity in functionalized MXene is transformed into an electromagnetic stealth advantage, where its combination with metasurface geometric design significantly broadens the absorption bandwidth. Crucially, functionalized MXene retains superior rheological properties, enabling rapid, scalable fabrication of flexible metasurfaces via high‐resolution printed electronics. This structural optimization surpasses the conventional thickness limit, achieving broadband absorption exceeding 90% across 17.2 GHz (full Ka‐band) at an ultrathin profile of 0.108 λ _L (1.35 mm). The integrated system demonstrates robust dual‐mode anti‐icing, characterized by a 110.8° contact angle (confirming passive anti‐icing capability), and achieves rapid and complete de‐icing within 58 s. This work establishes a paradigm of material design synergizing with structural design, realizing multifunctional integration and offering a scalable pathway for next‐generation intelligent aerospace platforms.