Interface‐Induced Self‐Assembly Strategy Toward 2D Ordered Mesoporous Carbon/MXene Heterostructures for High‐Performance Supercapacitors

Two‐dimensional transition metal carbonitrides (MXene) have demonstrated great potential in many fields. However, the serious aggregation and poor thermodynamic stability of MXene greatly hinder their applications. Here, an interface‐induced self‐assembly strategy to synthesize ordered mesoporous carbon/Ti3C2Tx heterostructures (OMCTs) was developed. In this method, the composite monomicelles formed by Pluronic F127 and low‐molecular‐weight phenolic resol self‐assembled on the surface of Ti3C2Tx to prevent the restacking of Ti3C2Tx and maintain its thermostability. The obtained OMCTs possessed high specific surface areas (259–544 m2 g−1), large pore volumes (0.296–0.481 cm3 g−1), and excellent thermodynamic stability (up to 600 °C). Benefiting from these advantages, OMCTs serving as the electrode materials for supercapacitor exhibited superior supercapacitor performances, including high capacitance of 247 F g−1 at 0.2 A g−1, satisfactory rate performance of 190 F g−1 at 5 A g−1, and cyclability. The best of both worlds: An interface‐induced self‐assembly strategy is employed to synthesize ordered mesoporous carbon/Ti3C2Tx heterostructures with high specific surface area and excellent thermostability. The obtained samples combine the advantages of ordered mesoporous carbon and MXene and exhibit superior electrochemical performance.