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

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 Ti3C2Tx deposited on decorated nylon 6 (DPA) film (COF@N-Ti3C2Tx/DPA) via layer-by-layer fabrication. The hierarchical COF@N-Ti3C2Tx/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.

Automated summary

Designing deformable supercapacitors (D-SCs) with robust skeleton and active channels is crucial for wearable systems. The COF@N-Ti3C2Tx/DPA D-SCs exhibit excellent performance in terms of specific capacitance, rate performance, and cycling stability in a three-electrode system. The solid-state D-SCs also have favorable energy density and deformable stabilities, retaining a high capacitance after bending, stretching, and folding cycles.