Impedance Spectroscopy Study on Graphene Wrapped Nanocrystalline V2O5.

Nanocrystalline V₂O₅ was synthesized by solvothermal technique, which has potential application as electrode material in supercapacitors. The graphene oxide (GO) was prepared by modified Hummer's method. The V₂O₅/ reduced graphene oxide (RGO) composite was synthesized using surfactant free hydrothermal technique to enhance the functionality in terms of conductivity and surface area of V₂O₅. The structural characterization was accomplished through X-ray diffraction and Raman spectroscopy. Morphology was identified by SEM and surface area of VRGO was enhanced by 8 times in comparison with V₂O₅ nano particles, as confirmed through BET surface area analysis. Electrical characterization was done through impedance spectroscopy and the results showed decrease in sample resistance after wrapping V₂O₅ with RGO. [ABSTRACT FROM AUTHOR]