MXene Enhanced 3D Needled Waste Denim Felt for High-Performance Flexible Supercapacitors

Highlights An ultralight and flexible supercapacitor is developed by an effective 3D fabrication method that uses MXene to fabricate waste denim felt through needling and carbonization. The electrodes have a maximum specific capacitance of 1748.5 mF cm −2 and demonstrate remarkable cycling stability with more than 94% after 15,000 galvanostatic charge/discharge cycles The loaded more MXene onto Z -directional fiber bundles results in enhanced specific capacitance, energy density and power density of supercapacitors.