In Situ Growth of Three‐Dimensional MXene/Metal–Organic Framework Composites for High‐Performance Supercapacitors.

In this study, we propose a versatile method for synthesizing uniform three‐dimensional (3D) metal carbides, nitrides, and carbonitrides (MXenes)/metal–organic frameworks (MOFs) composites (Ti3C2T<italic>X</italic>/Cu‐BTC, Ti3C2T<italic>X</italic>/Fe,Co‐PBA, Ti3C2T<italic>X</italic>/ZIF‐8, and Ti3C2T<italic>X</italic>/ZIF‐67) that combine the advantages of MOFs and MXenes to enhance stability and improve conductivity. Subsequently, 3D hollow Ti3C2T<italic>X</italic>/ZIF‐67/CoV2O6 composites with excellent electron‐ and ion‐transport properties derived from Ti3C2T<italic>X</italic>/ZIF‐67 were synthesized. The specific capacitance of the Ti3C2T<italic>X</italic>/ZIF‐67/CoV2O6 electrode was 285.5 F g−1, which is much higher than that of the ZIF‐67 and Ti3C2T<italic>X</italic>/ZIF‐67 electrode. This study opens a new avenue for the design and synthesis of MXene/MOF composites and complex hollow structures with tailorable structures and compositions for various applications. [ABSTRACT FROM AUTHOR]