Optimized MoS2-V2O5 nanocomposites: Unveiling superior structural, morphological, and electrochemical properties for advanced energy storage applications
Prashant, Nirbhay Singh, Abhishek Kumar, Vikas Dhiman, Simran Kour, A. L. Sharma, Rahul Sharma, Neha Kondal
Abstract
Among the latest advancements in supercapacitor electrode materials , composite materials derived from transition metals and dichalcogenides have gained significant popularity. Their appeal stems from their electronic conductivity , multiple oxidation states, extensive surface area, and porous structure . This study investigates the structural, morphological, and electrochemical properties of MoS 2 -V 2 O 5 nanocomposites that were synthesized via a hydrothermal method with varying MoS 2 concentrations. X-ray diffraction (XRD) studies confirmed the orthorhombic crystalline structure of V 2 O 5 and the hexagonal structure of MoS 2 , with an observed random stacking of MoS 2 layers affecting crystallinity . Raman spectroscopy further supported these structural findings. Field emission scanning electron microscopy (FESEM) indicated distinct morphological alterations with varying MoS 2 ratios, indicating increased porosity at higher MoS 2 concentrations. The Brunauer-Emmett-Teller (BET) surface area study demonstrated that the specific surface area varied with MoS₂ content, influencing pore size and volume. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) demonstrated that the 1:4 MoS 2 -V 2 O 5 composite exhibited the best electrochemical performance, with the lowest resistance and highest specific capacitance . These findings suggest that the optimized MoS 2 -V 2 O 5 nanocomposite is suitable for energy storage applications because of its enhanced specific surface area, porosity, and electrochemical properties.