Improving the Supercapacitance Performance of V 2 O 5 Interconnected Al 2 O 3 Composite Electrode for Energy Storage Application

Designing and synthesizing of transition metal oxide complex nanostructures were involving a high-capacity electrodes for energy storage applications. In this research work, we have systematically synthesised the V ₂ O ₅ /Al ₂ O ₃ composite electrode which is evaluated the charge storage activities in an aqueous system to confirmed the supercapacitor properties. Further, the obtained composite electrode was estimated by various physico-chemical techniques. The XRD pattern, FE-SEM, TEM images and BET analysis were confirms orthorhombic crystalline structure of V ₂ O ₅ /Al ₂ O ₃ as mixed crystalline in phase and good formation of the composite electrode with remarkable porous properties. The charge storage activities of this composite electrode were evaluated via three-electrode system in 1 M KOH electrolyte solution. As output result, the V ₂ O ₅ /Al ₂ O ₃ composite electrode achieved the 746.6 F g ^− 1 at the current density value of 1 A g ^− 1 . Interestingly, the electrode was attained the 87.4% stability retention in 3000 cycles. These acceptable electrochemical performances are ascribed to the synergistic effect metal oxides, which is coexistence of various electronic states of this V ₂ O ₅ /Al ₂ O ₃ composite.