Trace Amounts of PLA Driven MXene-based Electrode Balanced Electrochemical Performance for Enhanced Flexible Cyclic Stability

MXene all-solid-state supercapacitors show significant potential for various applications, however, the poor cycling stability under bending stresses restricts their feasibility in commercial use. To address this challenge, a flexible PLA/MXene electrode material with excellent cycling stability was prepared. Electrochemical testing revealed that the PLA/MXene electrode material exhibited a capacity retention of 96.3% after 10,000 cycles under 5   A/g current density. Furthermore, asymmetric all-solid-state supercapacitors, constructed with PLA/MXene film electrodes, retain 92.3% of their initial capacitance after 2,000 charge-discharge cycles at bending angles of 0°, 30°, 60°, and 90°, respectively. The significant improvement suggests that trace amounts of PLA can enhance the cycling stability of MXene electrodes compared to the 84.7% capacitance retention observed in MXene-based supercapacitors. This work provides a straightforward approach to fabricating future flexible wearable devices.