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Fabrication and characterization of vanadium oxide-polyaniline (VOP) composites for high-performance supercapacitors

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Abstract

This work portrays the synthesis of vanadium oxide with a polyaniline-based composite for supercapacitor utilization. For this purpose, by integrating vanadium pentaoxide V2O5 (VO) into the Polyaniline (PANI) and reduced graphene oxide ‘rGO’ (RG) matrix through an in situ polymerization and sol-gel technique, polyaniline/vanadium pentaoxide (VOP), rGO/Vanadium pentaoxide (VORG) nanocomposites are effectively designed. The XRD patterns of nanocomposites show clear, well-defined peaks, indicating the existence of the VO inside the PANI and rGO matrix. Images obtained using a scanning electron microscope (SEM) reveal that the rGO and PANI were evenly distributed among the nanoparticles in the composites. Current voltage measurements confirm the maximal conductivity for VOP nanocomposites. The electrochemical performance was tested in a standard three-electrode assembly that revealed superior charge storage properties of the VOP composite at a current density of 1 A g−1, with the highest specific capacitance of 1666.67 F g−1 among all the electrodes at similar conditions. The maximum energy density value of 227.92 Wh kg−1 with a power density of 918.85 W kg−1 is observed for VOP nanocomposites. Furthermore, VOP retains around 98.6% of its original capacitance after 1000 charge-discharge cycles and displays better cyclic stability.

Graphical Abstract

Highlights

  • Using sol-gel technique, polyaniline/vanadium pentaoxide, rGO/ Vanadium pentaoxide nanocomposites are effectively designed.

  • XRD patterns shows well-defined peaks, and morphology reveals evenly distribution of rGo and PANI among VO nanocomposites.

  • Current voltage measurements confirm the maximal conductivity for VOP nanocomposites.

  • The VOP composite shows the highest specific capacitance of 1666.67 F g−1 at a current density of 1A g−1.

  • The maximum energy density value of 227.92 Wh kg−1 with a power density of 918.85 W kg−1 is observed for VOP nanocomposites.

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Acknowledgements

This research has been funded by the Scientific Research Deanship at the University of Ha’il- Saudi Arabia, through project number BA-23 013. The authors highly appreciate and introduce deep thanks for the Scientific Research Deanship University of Hail, Saudi Arabia.

Author contributions

The Authors, SUA and KDA, suggest the idea. RB, and SUA, synthesized the material. KDA, BHA, SUA, and RB, helped to write the initial draft and helped to improve the manuscript till the final version. The manuscript was written through the contributions of all authors. All authors have approved the final version of the manuscript.

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  1. Chemistry Department, Faculty of Science, University of Hail, P.O. Box 2440, Hail, 81451, Saudi Arabia

    Kaseb D. Alanazi & Basmah H. Alshammari

  2. School of Materials and Energy, Yunnan University, Kunming, 650091, China

    Rabia Bashir & Sana Ullah Asif

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  1. Kaseb D. Alanazi
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Alanazi, K.D., Alshammari, B.H., Bashir, R. et al. Fabrication and characterization of vanadium oxide-polyaniline (VOP) composites for high-performance supercapacitors. J Sol-Gel Sci Technol (2024). https://doi.org/10.1007/s10971-024-06328-6

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