Abstract
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 hydrothermal 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.
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