Ultrasound-assisted synthesized multi-phase copper vanadate (Cu₃V₂O₈/Cu₂V₂O₇/Cu_0.4V₂O₅) shape-controlled nanoparticles as electrode material for energy storage applications

In this study, complex phases of copper vanadium oxides, including Cu₃V₂O₈, Cu₂V₂O₇ and Cu_0.4V₂O₅, 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 °C. 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 significantly. The specific capacitances of CuV and CuV + 3%PVP nanoparticles are 233 F/g and 316 F/g respectively. Thus, copper vanadate materials may be observed as capable electrode material for pseudocapacitor applications.