Authors
Pratibha B Suryavanshi, Ahmed H Al-Naggar, Harsh K Gaikwad, Smita V Deore, Bapusaheb M Suryavanshi
Published in
RSC advances. Sep 02, 2026. Epub Sep 02, 2026.
Abstract
Chemical synthesis plays an important role in determining the structural and electrochemical properties of metal oxide nanomaterials for energy-storage applications. Herein, Zr-incorporated monoclinic WO3 nanostructures were directly grown on carbon cloth using a simple chemical bath deposition method and investigated as binder-free electrodes for aqueous supercapacitors. The effect of Zr concentration on the morphology, structure, composition, and electrochemical response of WO3 was systematically examined. Among the investigated samples, the optimized 5% Zr-WO3 electrode exhibited improved electrochemical performance compared with pristine WO3 in 1 M H2SO4 within a potential window of 0 to -0.4 V vs. Ag/AgCl. The optimized electrode delivered a specific capacitance of 840 F g-1 at 8 A g-1, corresponding to a 5.6-fold improvement over pristine WO3. The enhanced charge-storage behavior is attributed to the modified local electronic environment, accessible nanostructured morphology, and improved electrode/electrolyte interaction after Zr incorporation. A symmetric aqueous supercapacitor device assembled using identical optimized electrodes achieved an energy density of 24 Wh kg-1 at a power density of 5500 W kg-1 and showed stable cycling behavior under aqueous operating conditions. In addition, the device was able to power multiple light-emitting diodes, indicating its practical applicability. This work highlights controlled Zr incorporation as a feasible approach for tuning WO3-based binder-free electrodes for electrochemical energy-storage applications.
PMID:
42689227
Bibliographic data and abstract were imported from PubMed on 03 Sep 2026.
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