Hydrogen‐Bond Locking of MXene/Chitin Biocompatible Electrodes for Flexible Supercapacitors

ABSTRACT Designing efficient ion transport channels in MXene‐based flexible electrodes is crucial yet challenging for high‐rate supercapacitors. Herein, a biocompatible hydrogen‐bonding crosslinking strategy is presented to construct patterned MXene/chitin microsphere (CM) electrodes. Surface modification of MXene nanosheets with oxygen‐containing groups, coupled with the natural polymer chitin, establishes a robust porous network stabilized by intensive hydrogen bonds. This unique architecture effectively mitigates self‐restacking, reduces ion diffusion tortuosity, and exposes abundant active sites, leading to remarkable electrochemical performance with high capacitance of 421.5 F g −1 and superior cycling stability (85.72% retention after 10 000 cycles). The successful fabrication of customizable patterns via a simple vacuum filtration method highlights their practicality for flexible digital devices. This study provides fundamental insights into non‐covalent interaction‐driven electrode engineering, offering a sustainable and biocompatible pathway toward future flexible energy storage systems.