Advanced MOF/MXene heterostructure with carbon aerogel to boosts the ions movement in asymmetric supercapacitors and hydrogen production

Supercapacitors represent a promising avenue for advanced energy storage solutions. However, achieving devices that simultaneously possess all the ideal properties, such as high capacitance, fast charge-discharge rates, and excellent cyclability, remains a significant challenge. Herein, a facile approach for fabricating carbon aerogel-induced chromium metal-organic framework (CA@MIL-101) integrated with titanium carbide MXene (CA@MIL-101-(Cr)/Ti 3 C 2 T x ) nanocomposites was demonstrated via hydrothermal method. The CA@MIL-101-(Cr)/Ti 3 C 2 T x nanocomposites offer numerous divalent ion active sites and significantly improve charge transfer kinetics, attributed to their interconnected porous structure. This novel anode exhibits an outstanding specific capacity of 1632 Cg -1 with a PVDF binder-based electrode and a high rate of performance. Moreover, a full-cell supercapacitor was developed with carbon aerogel as the cathode and CA@MIL-101 (Cr)/Ti 3 C 2 T x as the anode. With its hierarchical pore structure and functional groups, the CA@MIL-101 (Cr)/Ti 3 C 2 T x anode achieves an energy density of 38 Wh-kg −1 , a high-power density of 1280 W-kg −1 , and robust anti-self-discharge behavior. The CA@MIL-101 (Cr)/Ti 3 C 2 T x //CA supercapattery uses both adsorption/desorption processes and faradaic reactions for charge storage. The synthesized materials also perform exceptionally well electro-catalytically. This research advances high-performance CA@MIL-101 (Cr)/Ti 3 C 2 T x electrodes, enhances understanding of supercapacitor charge storage, and paves the way for next-generation energy storage technologies.