MXene-coated silk-derived carbon cloth toward flexible electrode for supercapacitor application

摘要

Flexible supercapacitors are promising energy storage devices in wearable smart electronics.Exploring cost-efficient electrodes with high capacitance would promote the wide-scale application of such capacitors.Herein,in order to explore a methodology for preparing low cost,flexible,tough,and up-scalable supercapacitor electrodes,silk textile is directly carbonized to make a conductive free-standing textile substrate.Through mildly baking the surfactant-free Ti3C2Tx flakes suspension loaded on the carbonized silk cloth,a uniform and adhesive coating consisting of nanometer-thick Ti3C2Tx flakes is well established on the conductive fabric support,forming a MXene-coated flexible textile electrode.The fabricated electrode exhibits a high areal capacitance of 362 mF/cm2 with excellent cyclability and flexibility.Moreover,capacitance changes neglegibly under the bending deformation mode.This study elucidates the feasibility of using silk-derived carbon cloth from biomss for MXene-based flexible supercapacitor.