Lightweight aerogels feature multifunctionality and a high porosity, yet accompanied with poor structure recovery under large strain deformations. In this work, we develop an air bubble-ice crystal dual template and annealing strategy to integrate low density and high resilience for the conductive transition metal carbides/nitrides (MXene) composite aerogels. The air bubbles and ice crystals synergistically exclude the nanosheets to the gas-liquid interfaces, thereby constructing unique Y-shaped junctions and robust skeleton. Subsequent annealing process greatly enhances the interlayer interactions. Under external load, the Y-shaped structures prevent the stress concentration at the junctions by transferring the forces to the skeleton for maintaining structural stability. In addition, the wrinkled and thick cell walls, together with the enhanced interlayer interactions, endow the aerogel with exceptional structural stability and resilience. As a result, the MXene/reduced graphene oxide (RGO) composite aerogels exhibit superelasticity with reversible compressive strains of up to 95%. In addition, the electron bridging effect of the RGO sheets affords the aerogel to deliver excellent electromagnetic interference shielding performance, as high as 46.3 dB at 2.5 mm. Furthermore, the remarkable reshapeability of the aerogels allows for precise regulation of structure and performance (33.5–75.1 dB) by a simple wetting compression process. In summary, this work offers helpful inspirations for developing lightweight and superelasticity aerogels for extensive applications.

Intelligent electromagnetic interference (EMI) shielding modulators with a wide tuning range and cyclic stability are urgently needed but their fabrication remains challenging. A gel-like MXene/norepinephrine ink is developed and multifunctional MXene gratings with wide EMI shielding effectiveness (SE) tuning range, superior reversibility, and high mechanical flexibility are constructed by direct ink writing approach for dynamic EMI shielding and patterned Joule heating applications. The modulable MXene/norepinephrine grating with a high conductivity of 3510 S·cm⁻¹ can conveniently realize the seamless modulation of the EMI SE by adjusting the angle between the MXene grating filaments and the electric field of the incident electromagnetic waves, offering highly reversible switching between shielding “On” (28.0 dB) and “Off” (0.5 dB) states. Notably, due to the optimized integration of the MXene ink and the rationally designed pattern, a superior specific EMI SE of 95,688.2 dB·cm²·g⁻¹ is achieved in the “On” state. Furthermore, the MXene/norepinephrine ink can be used to fabricate many complex patterned gratings with superior stability, instant responsibility, and superb mechanical flexibility, exhibiting a unique patterned Joule heating behavior. Direct writing of multifunctional gratings paves a means for developing intelligent EMI shielding materials, wearable electronic devices, and advanced thermal management materials.