Improved Specific Capacitance of Amorphous Vanadium Pentoxide in a Nanoporous Alumina Template

摘要

This article investigates the physicochemical properties of vanadium pentoxide V2O5 prepared by anodic electrodeposition onto two nanoporous alumina templates having pore sizes of 50 and 200 nm. V2O5 formed inside the templates was an amorphous structure with flakelike 50 nm and round 200 nm shapes. The capacitance of V2O5 was measured using cyclic voltammetry in 1 M KCl electrolyte, and ca. 900 F g1 of maximum specific capacitance was obtained from V2O5 in 50 nm alumina oxide. Improved specific capacitance of V2O5 is ascribed to the high surface area of the porous structure by the use of the template