Synthesis of Nitrogen-Doped Two-Dimensional Ti₃C₂with Enhanced Electrochemical Performance

Two-dimensional transition metal carbides (MXenes) have aroused considerable attention as promising electrode materials for supercapacitors owing to their superior electrochemical performance. In this study, we have synthesized a novel nitrogen-doped Ti 3 C 2 (N-Ti 3 C 2 ) nanosheets by a facile one-step hydrothermal reaction using low-cost industrial material urea as nitrogen source. The as-received N-Ti 3 C 2 exhibits a maximum specific capacitance of 156 F g −1 at a scan rate of 5 mV s −1 with high cycle stability in 6 M KOH electrolyte. It indicates that the new kind of N-Ti 3 C 2 can be deemed as an excellent electrode material for high-performance supercapacitors.