A Ti3C2TX@PEDOT composite for electrode materials of supercapacitors

In this study, Ti 3 C 2 T X @PEDOT composite is synthesized using multilayer Ti 3 C 2 T X and conductive polymer poly(3,4-ethylenedioxythiophene) (PEDOT) by a simple in-situ polymerization method. The PEDOT component effectively solves the problem of Ti 3 C 2 T X layers stacking and further improves the specific surface area of Ti 3 C 2 T X . Besides, additional pseudocapacitance is also provided by the added PEDOT component. In 1 M H 2 SO 4 , the Ti 3 C 2 T X @PEDOT (1:10) composite exhibits a higher capacitance (564 F g −1 ) at the current density of 1 A g −1 compared to the original Ti 3 C 2 T X material, and excellent cycling performance with a capacitance retention of 96.5% after 10,000 charge/discharge cycles at a current density of 10 A g −1 . The Ti 3 C 2 Tx@PEDOT(1:10)-based symmetric supercapacitor shows a specific capacitance of 100 F g −1 at the current density of 1 A g −1 , and an energy density of 6.34 Wh kg −1 at the power density of 4077 W kg −1 . The enhanced electrochemical performance and stability are due to the surface redox process and synergistic effects of the Ti 3 C 2 T X @PEDOT.