A nitrogenous pre-intercalation strategy for the synthesis of nitrogen-doped Ti3C2TxMXene with enhanced electrochemical capacitance

A two-step pre-intercalation strategy is developed, using ammonium citrate as an all-in-one intercalant, antioxidant and nitrogen source, for producing nitrogen-doped Ti₃C₂T_x MXene with improved electrochemical capacitance and high-rate performance.