Study of structural and electrochemical properties of tungsten-doped V2O5 nanostructures for solid state energy storage applications

Lakshmi Sajeev, C. Sreelakshmi, Merlin R. Charlotte, Alisha Mary Manoj, Chittur Krishnaswamy Subramaniam, Narayanasamy Arunai Nambi Raj, Bharathi Rajeswaran, Leema Rose Viannie

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Vanadium-based nanostructures are extensively studied for energy storage applications due to their excellent charge transfer capability. However, low electrical conductivity limits their commercial application. This can be overcome by suitably doping cations into the crystal lattice of vanadium pentoxide (V2O5) without inducing any phase change within the material. Herein, we report the synthesis of tungsten (W)-doped vanadium pentoxide (W-V2O5) nanosheets with enhanced conductivity through a low temperature wet chemical route for a range of W doping in V2O5 from 0.5 to 1.2 at. %. The successful incorporation of tungsten into the V2O5 lattice was confirmed from the X-ray Diffraction results and Energy Dispersive Spectroscopy. A symmetric two-electrode system was used to evaluate the electrochemical properties. The system consists of W-V2O5 coated carbon fibrous sheet as the active electrode, grafoil current collectors and Nafion conducting polymer as the electrolyte. A highest specific capacitance of 104 F/g was achieved at 0.5 at. % of tungsten doping. This novel configuration with solid state electrolyte shows reduced charge transfer resistance due to enhanced surface reactivity of W-V2O5 nanoparticles and hence, promising electrode material for energy storage applications.

Original languageEnglish
Pages (from-to)24159-24172
Number of pages14
JournalJournal of Materials Science: Materials in Electronics
Volume33
Issue number31
DOIs
StatePublished - Nov 2022

Bibliographical note

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

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