Ultrasound - assisted synthesized multi-phase copper vanadate (Cu 3 V 2 O 8 /Cu 2 V 2 O 7 /Cu 0.4 V 2 O 5 ) shape-controlled nanoparticles as electrode material for energy storage applications

Abstract

In this novel study, complex phases of copper vanadium oxides, including Cu3V2O8, Cu2V2O7, and Cu0.4V2O5, were synthesized using an ultrasound-assisted co-precipitation technique and evaluated as suitable electrodes for energy storage devices that exhibit pseudo-capacitive behavior.The structural properties investigation of CuV, CuV + 0.3%PVP and CuV + 3%PVP nanoparticles at 400 oC. The XRD patterns confirm monoclinic crystal system with multi-phase nature of copper vanadate’s further morphology have been optimized with stabilizing and shape-directing agent Polyvinylpyrrolidone (CuV + 0.3%PVP and CuV + 3%PVP) only at elevated temperature 400℃. The electrochemical behavior of CuV + 0.3%PVP and CuV + 3%PVP were observed under cyclic voltammetry (CV),Galvanostatic charge and discharge (GCD) and Electronic impedance spectroscopy (EIS). Most significantly, the shape-controlled copper vanadate nanoparticles (CuV + 3%PVP) exhibited exceptional electrochemical performance, demonstrating a notable specific capacitance increased significantly23.2% improvement. The specific capacitances of CuV and CuV + 3%PVP nanoparticles are 211.09 F/g 260.4 F/g respectively, an impressive energy density of 107.25 Wh/kg and power density of 297.9W/kg at 0.5 A/g. Thus, copper-vanadate materials may be observed as capable short time e high voltage electrode for pseudo capacitor applications.