Effect of Ti₃C₂T _x MXenes etched at elevated temperatures using concentrated acid on binder-free supercapacitors.

ABSTRACT: The effect of Ti₃C₂T _x MXene etched at different temperatures (25 °C, 50 °C, and 80 °C) on the capacitance of supercapacitors without the use of conducting carbon-black or a binder was studied. The MXene etched using concentrated HCl acid (12 M)/LiF was used as an active electrode and Ni-foil as a current collector. It was observed that the elevated etching temperature facilitates the etching of the MAX phase and the exfoliation of MXene layers. However, this led to the formation of additional functional groups at the MXene surface as the temperature was increased to 80 °C. The specific capacitance of Ti₃C₂T _x -based supercapacitors increased from 581 F g^-1 for MXene etched at 25 °C to 657 F g^-1

SUBMITTER: Kumar S 

PROVIDER: S-EPMC9057861 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature