Capacitance performance of Ti3C2Tx MXene nanosheets on alkaline and neutral electrolytes

The high electrical conductivity, good hydrophilicity, and various surface terminal configurations of MXenes have exposed extensive attention in the field of energy storage. Ti3C2Tx MXene was synthesised via a facile chemical process. A study of Ti3C2Tx MXene's structure, composition, and morphology was carried out using X-ray diffraction (XRD), Raman spectroscopy (RS), X-ray photoelectron spectroscopy (XPS), and Field emission scanning electron microscopy (FESEM). A detailed study of the influence of aqueous electrolytes on the charge storage performance of Ti3C2Tx MXene was conducted by cyclic voltammetry (CV), galvanostatic charge -discharge (GCD), cyclic stability (CS), and electrochemical impedance spectroscopy (EIS). In addition, it is proposed that Ti3C2Tx MXene's surface terminations affect its capacitance behaviour in aqueous electrolytes. Ti3C2Tx MXene in 3 M (KOH) alkaline electrolyte has good electrochemical performance, with a specific capacitance (Cs) of up to 92 F/g at 2A/g, making it a potential material for supercapacitors.

Automated summary

The high electrical conductivity, good hydrophilicity, and various surface terminal configurations of MXenes have attracted extensive attention in the field of energy storage. A study on the structure, composition, and morphology of Ti3C2Tx MXene was conducted using XRD, RS, XPS, and FESEM. The influence of aqueous electrolytes on the charge storage performance of Ti3C2Tx MXene was investigated through CV, GCD, CS, and EIS. It was found that the surface terminations of Ti3C2Tx MXene affect its capacitance behavior in aqueous electrolytes. Ti3C2Tx MXene exhibited excellent electrochemical performance in 3 M (KOH) alkaline electrolyte with a specific capacitance of up to 92 F/g at 2A/g, making it a promising material for supercapacitors.