Synthesis of 2-Dimensional Novel Ti3C2Tx/NaF nano-composites and Fabrication of Electrode for Electrochemical performance of Pseudo-capacitive Supercapacitor Device

Abstract The increasing global demand for energy storage solutions has spurred interest in advanced materials for electrochemical energy storage devices. Transition-metal carbides and nitrides known as MXenes, characterized by remarkable conductivity and tunable properties, have gained attention for their potential in energy storage applications. The properties of two-dimensional (2-D) MXenes can be tuned by doping or composite formation for energy storage applications. We report a novel Ti3C2Tx/NaF composite via a straightforward hydrothermal process for supercapacitor electrode applications. Three different composites with varying NaF concentrations (1%, 3%, and 5%) were synthesized under uniform conditions. Structural characterization using X-ray diffraction (XRD) and scanning electron microscopy (SEM) confirmed the successful formation of the composites, whereas, distinct shifts in XRD peaks and new peaks revealed the presence of NaF. Electrochemical performance was evaluated by cyclic voltammetry (CV), galvanostatic charging-discharging (GCD), and electrochemical impedance spectroscopy (EIS). The composites exhibited pseudo-capacitive behavior with reversible redox reactions during charge and discharge cycles. Specific capacitance of 191 F/g at scan rates of 2 mV/s was measured in 1M KOH. Electrochemical impedance spectroscopy (EIS) revealed an escalating impedance factor as NaF content increases within Ti3C2Tx. This study underscores the versatile energy storage potential of Ti3C2Tx/NaF composites, offering insights into their tailored properties and behavior.