Electrochemical characteristics of V2O5/rGO synthesized by sol-gel method in water electrolyte

Abstract

Today, rechargeable Li- ion batteries have widespread use as power sources. However, the organic electrolytes used in these batteries are toxic, so the use of aqueous electrolytes is preferred. Vanadium pentoxide has been intensively studied as a cathode material for use in batteries with aqueous electrolytes. In this work, the V2O5 composite with reduced graphene oxide was synthesized by a simple sol-gel synthesis. Material was characterized by XRD, thermal analysis and optical microscope. The electrochemical properties of the composite material were examined by the method of cyclic voltammetry at different polarization speeds. Aqueous electrolytes LiNO3, NaNO3 and Mg (NO3)2 were used. These characteristics were correlated to determine for which type of batteries the tested composite can be used, as well as how reduced graphene oxide affects the stability and capacity value of V2O5.