Engineered Ti 3 C 2 T x /MoS 2 /PANI Nanocomposite Electrode for High‐Performance Supercapacitor Applications

Two‐dimensional Ti 3 C 2 T x MXene has emerged as a promising electrode material for high‐performance supercapacitors because of its metallic conductivity, hydrophilic surface chemistry, and rapid ion transport. However, severe nanosheet restacking and structural degradation during repeated cycling restrict its practical electrochemical utilization. In this study, a hierarchical Ti 3 C 2 T x /MoS 2 /PANI (MMP) ternary nanocomposite was engineered through LiF/HCl‐assisted MXene etching, hydrothermal synthesis of MoS 2 nanoflowers, and in situ oxidative polymerization of polyaniline. The synergistic integration of Ti 3 C 2 T x , MoS 2 , and PANI effectively suppresses MXene restacking, enhances electrochemically accessible active sites, and promotes rapid electron and ion transport. The optimized electrode delivered a high specific capacitance ( C s ) of 1333 Fg −1 at 10 mVs −1 and 1292 Fg −1 at 1 Ag −1 , together with an energy density of 67 Whkg −1 , a power density of 1747 W kg − 1 , and 95% capacitance retention after 10,000 charge–discharge cycles. Furthermore, the assembled symmetric supercapacitor achieved a C s of 328 Fg −1 at 1 Ag −1 with an energy density of 20 Whkg −1 and a power density of 2500 Wkg −1 , demonstrating excellent reversibility and long‐term operational stability. These findings highlight the effectiveness of ternary interface engineering for developing durable, high‐performance MXene‐based electrodes for next‐generation electrochemical energy storage.