Template-based growth of V 2 O 5 nanorods by electrodeposition

Abstract

Template-based growth of single crystal V 2 O 5 nanorods by either electrochemical or electrophoretic deposition was studied. Specifically, standard electrochemical deposition from VOSO 4 solution, electrochemically induced deposition by local pH change of VO 2 + solution, and electrophoretic deposition of nanoclusters in V 2 O 5 sol were investigated.From each route, uniformly sized V 2 O 5 n a n o r o d s a b o u t 1 0 µ m in length were grown over large area with nearly unidirectional alignment, but with various extent of lateral shrinkage when fired at 500°C. These grown V 2 O 5 nanorods all have the same single-crystal structure, regardless of deposition method and initial solutions or sol used.

Transition metal oxides – Thermoelectric properties

“…nanostructures such as nanotubes and nanowires [249,250]. Other liquid phase methods include the electrodeposition and anodization techniques which have also been shown to synthesise V2O5 nanostructures [251][252][253].…”

Ni−V2O5·nH2O Core−Shell Nanocable Arrays for Enhanced Electrochemical Intercalation

“…Martin et al investigated the electrochemical properties of vanadium pentoxide nanorod arrays made by filling vanadium oxide sol into porous polycarbonate (PC) membranes, and reported that nanorod arrays achieved 4 times the capacity of a thin-film electrode. We recently demonstrated single-crystal V 2 O 5 nanorod arrays grown by electrochemical deposition, surface condensation induced by a change of local pH as a result of H 2 O electrolysis, and sol−gel electrophoretic deposition, combined with template growth methods. , Single-crystal V 2 O 5 nanorod-array electrode has 5 times higher energy storage density than sol−gel derived films in a current density of 0.7 A/g. , These results suggest that the specific surface area of electrode is important since the redox or intercalation reactions occur at and near the electrode interface with electrolyte; hence a nanorod array structure is effective for use as a capacitor.…”