Electrospinning Achieving Supramolecular Cyclodextrin‐Polyaniline Layered Fabric for Expanding Conductive Performance of Flexible Electrode

Supercapacitor electrode materials are increasingly indispensable for energy storage in wearable and flexible electronics. Herein, the electrospun assembled supramolecular nanofibrous P-PC@CD was fabricated from polyacrylonitrile (PAN), camphorsulfonic acid-doped polyaniline (PANI-CSA), and various cyclodextrins (CDs) and their derivatives. Subsequently, an in situ polymerized polyaniline (PANI) layer was introduced, forming a low-resistance layered electrode P-PC@CD@PANI. Among these, β-CD significantly enhances electrochemical performance, delivering an areal capacitance 353 times higher than that of PAN + PANI mixed fibers prior to polymerization. The P-PC@β-CD@PANI electrode also exhibits excellent flexibility, maintaining 97.0% capacitance after 100 cycles of repeated 180° bending and 94.0% after 1000 cycles. Moreover, after 24 h storage at 75% relative humidity and room temperature, as well as at 37°C, capacitance retention remains at 97.3% and 98.7%, respectively. The device can stably power a light-emitting diode (LED). This work provides a high-performance supramolecular flexible electrode and offers new insights into electrospinning-based supramolecular assembly for electrochemical applications.