Hydrothermal Synthesis of Cobalt Vanadium Oxide (Co3V2O8) Hexagonal Disc for High-Performance Supercapacitors

To fulfill the global energy demands, the growth of high-capacity electrochemical energy storage (EES) devices with advanced electrode materials is highly desirable. Supercapacitors (SCs), a perfect energy storage device, can significantly attain the objective of high energy along with high-power densities. Herein, we successfully prepare the binary metal oxide Co3V2O8 (CVO) by altering the concentrations of vanadium through the facile hydro thermal method. Various characterization tools such as XRD, SEM, TEM, and EDX have been utilized to explore the physicochemical properties of CVO. The electrochemical characterization of CVOs has been carried out with three-electrode geometry. The electrochemical investigation of the samples was executed in a 2M aqueous potassium hydroxide (KOH) electrolyte. The resultant electrodes show elevated values of the specific capacitance of about 224, 241, and 184 F/g, respectively at a persistent current density of 5 mA/cm2. The as-fabricated advanced supercapacitors exhibited excellent energy densities of about 4.88, , 4.99 , and 3.79 Wh/kg at power densities of about 80.41 , 80.42 , and 77.62 W/kg, respectively. The improvement in specific capacitance, higher energy density, and power density indicates Co3V2O8 could be an appealing material for SCs electrodes.

Automated summary

To meet global energy demands, the development of high-capacity electrochemical energy storage devices with advanced electrode materials is crucial. In this study, the binary metal oxide Co3V2O8 (CVO) was successfully synthesized using a hydrothermal method, and its physicochemical properties were characterized using various techniques. The results showed that CVO exhibited high specific capacitance and energy density, making it a promising material for supercapacitor electrodes.