Synergistic performance of Ag-MOF@V₂CT_x composite for asymmetric supercapacitors and hydrogen evolution reaction

Extensive research is underway to process viable electrode materials for energy storage and hydrogen production. This study focuses on synthesizing Ag-MOF and V₂CTx, followed by their combination in a 50/50 wt% ratio to produce Ag-MOF@V₂CTx composite. Utilizing a three-electrode design, Ag-MOF@V₂CT_x exhibits specific capacitance 2180 Cg^-1 at current density of 2.0 A/g. BET testing reveals a significant specific surface area of 147 m²/g, enhancing electrochemical performance. The supercapattery which is constructed with Ag-MOF@V₂CT_x and activated carbon, yields a charge specific capacity of 283 Cg^-1. The Ag-MOF@V₂CT_x//AC configuration achieves a power density of 1230 Wkg^-1 and energy density of 75.12 Whkg⁻¹. Remarkably, behind 10,000 GCD cycles, Ag-MOF@V₂CT_x device retains 85 % of its capacity. Moreover, among all composites evaluated in (HER), Ag-MOF@V₂CT_x exhibits the lowest overpotential (119 mV). These findings underscore the significance of Ag-MOF@V₂CTx as electrode materials for energy storage devices and various energy applications.