Innovative MOF-5/V2CTx composite for high-performance, and ultra-fast supercapacitors and hydrogen evolution reaction

Abstract

This research work explores the potential of MXene, particularly two-dimensional vanadium carbide (V2CTx), for application in next-generation and existing energy storage systems. The material exhibits a convergence of functionalities: hydrophobicity, efficient charge transport, and exceptional surface redox activity. These combined advantages position MXene as a highly attractive material for energy storage purpose. Highlights the impressiveness of the characteristics, certain drawbacks have a significant impact on the electrochemical efficiency of MXene, such as the tendency of MXene sheets to reassemble. To prevent the reassembling of MXene layers, it is necessary to fill the gaps between them with an appropriate material. A comprehensive investigation has been carried out on the utilization of metal-organic frameworks (MOFs) in electrochemical applications. Due to its remarkable crystallinity, porosity, and large surface area, MOF-5 has been employed in several applications. While MOF-5 demonstrates potential as an electrode material, its limited specific capacity and rate capability necessitate the exploration of composite materials to optimize its performance. This study presents an innovative methodology to produce a composite material by combining MXene and MOF-5. Therefore, this can not only reduce the path of ion/electron transport channels, but also enhance the electroactive sites. Therefore, MXene prevented sheet restacking, although MOF-5 with MXene composite has outstanding specific and rate capacity. In three and two electrode configurations, the MOF-5/MXene the electrode possesses considerable specific capacities of 961 and 235 C/g, respectively. Prepared supercapattery device MOF-5/V2CTx//AC, determined an energy density of 48.75 Wh/Kg and can deliver a power density of 920 W/Kg. Additionally, astonishing cyclic stability, with a Coulombic efficiency of 97% and a capacitive efficiency of 95% after 16,000 alternative GCD cycles.