Interface‐Anchored Covalent Organic Frameworks@Amino‐Modified Ti3C2Tx MXene on Nylon 6 Film for High‐Performance Deformable Supercapacitors

Abstract Designing deformable supercapacitors (D‐SCs) that have robust skeleton and smoothly active channels for charges kinetic migration and faradic storage are highly crucial for wearable systems. Here, we develop the high‐performance D‐SCs made of the covalent organic frameworks(COF)@amino‐modified Ti 3 C 2 T x deposited on decorated nylon 6 (DPA) film (COF@N‐Ti 3 C 2 T x /DPA) via layer‐by‐layer fabrication. The hierarchical COF@N‐Ti 3 C 2 T x /DPA exhibits admirable specific capacitance, rate performance and cycling stability in three‐electrode system due to the superior H + storage property and large interfacial charge transfer clarified by density functional theory calculations. Additionally, the solid‐state D‐SCs deliver favourable energy density and practical energy‐supply applications. Particularly, the solid‐state D‐SCs present high deformable stabilities, with regard to 80.7, 80.6 and 83.4 % capacitance retention after 5000 bending cycles, 2000 stretching cycles and 5000 folding cycles, separately.