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<p>High-performance supercapacitor electrodes were developed by integrating vanadium pentoxide (V<sub>2</sub>O<sub>5</sub>) with multi-walled carbon nanotubes (MWCNTs) to achieve a synergistic balance between high conductivity and enhanced energy storage capability. The incorporation of MWCNTs effectively improved the electrical pathways, while V<sub>2</sub>O<sub>5</sub> provided abundant redox-active sites, resulting in superior charge storage behavior. V<sub>2</sub>O<sub>5</sub>/MWCNT nanocomposites were synthesized via a facile hydrothermal route and comprehensively characterized using x-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analyses to confirm their crystalline structure, surface morphology, and compositional integrity. Electrochemical evaluation through cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) in 3&#xa0;M KOH electrolyte revealed remarkable capacitive characteristics and stability. The optimized electrode exhibited high specific capacitance of 89.654&#xa0;F&#xa0;g<sup>−1</sup> at 0.1&#xa0;A&#xa0;g<sup>−1</sup>, retaining 91.56% of its initial value after 2000 charge−discharge cycles. When configured as an asymmetric supercapacitor (ASC), the device achieved specific capacitance of 81.635&#xa0;F&#xa0;g<sup>−1</sup> at 0.1&#xa0;A&#xa0;g<sup>−1</sup> and maintained 87.33% retention at 0.1&#xa0;A&#xa0;g<sup>−1</sup>, demonstrating excellent durability. Moreover, the ASC delivered impressive energy density of 7.241&#xa0;Wh&#xa0;kg<sup>−1</sup> and high-power density of 4550&#xa0;W&#xa0;kg<sup>−1</sup>. These findings highlight the potential of the V<sub>2</sub>O<sub>5</sub>/MWCNT nanocomposite as an efficient and durable electrode material for next-generation high-power energy storage systems.</p>

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Novel Synthesis of V2O5 Supported on 1D-MWCNT Nanocomposites Enhancing Electrochemical Energy Storage Performance of Asymmetric Supercapacitor

  • 期刊论文

  • 发表日期：

    2026年3月16日

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  • M. Sasikumar,
  • S. Seenivasan,
  • V. Sathiya,
  • S. Mahalakshmi

摘要

High-performance supercapacitor electrodes were developed by integrating vanadium pentoxide (V2O5) with multi-walled carbon nanotubes (MWCNTs) to achieve a synergistic balance between high conductivity and enhanced energy storage capability. The incorporation of MWCNTs effectively improved the electrical pathways, while V2O5 provided abundant redox-active sites, resulting in superior charge storage behavior. V2O5/MWCNT nanocomposites were synthesized via a facile hydrothermal route and comprehensively characterized using x-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analyses to confirm their crystalline structure, surface morphology, and compositional integrity. Electrochemical evaluation through cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) in 3 M KOH electrolyte revealed remarkable capacitive characteristics and stability. The optimized electrode exhibited high specific capacitance of 89.654 F g−1 at 0.1 A g−1, retaining 91.56% of its initial value after 2000 charge−discharge cycles. When configured as an asymmetric supercapacitor (ASC), the device achieved specific capacitance of 81.635 F g−1 at 0.1 A g−1 and maintained 87.33% retention at 0.1 A g−1, demonstrating excellent durability. Moreover, the ASC delivered impressive energy density of 7.241 Wh kg−1 and high-power density of 4550 W kg−1. These findings highlight the potential of the V2O5/MWCNT nanocomposite as an efficient and durable electrode material for next-generation high-power energy storage systems.