In this study, a simple hydrothermal method has been developed to prepare Ti₃C₂T_x from Ti₃AlC₂ as a high-performance electrode material for supercapacitors. This method is environmentally friendly and has a low level of danger. The morphology and structure of the Ti₃C₂T_x can be controlled by hydrothermal reaction time, temperature and NH₄F amounts. The prepared Ti₃C₂T_x was characterized by X-ray diffraction, field emission scanning electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy and Brunauer-Emmet-Teller. The results show that the prepared Ti₃C₂T_x is terminated by O, OH, and F groups. The electrochemical properties of the Ti₃C₂T_x sample exhibit specific capacitance up to 141 Fcm⁻³ in 3 M KOH aqueous electrolyte, and even after 1000 cycles, no significant degradation of the volumetric capacitance was observed. These results indicate that the Ti₃C₂T_x material prepared by this hydrothermal method can be used in high performance supercapacitors.