Abstract

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)/Ti3C2Tx) nanocomposites was demonstrated via hydrothermal method. The CA@MIL-101-(Cr)/Ti3C2Tx 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)/Ti3C2Tx as the anode. With its hierarchical pore structure and functional groups, the CA@MIL-101 (Cr)/Ti3C2Tx 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)/Ti3C2Tx//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)/Ti3C2Tx electrodes, enhances understanding of supercapacitor charge storage, and paves the way for next-generation energy storage technologies.

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