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Innovative hafnium oxide-vanadium oxide electrode with remarkably enhanced specific capacitance for supercapacitors

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  • Mumtaz, Asifa
  • Iqbal, Javed
  • Mumtaz, Misbah
  • Oneeb, Muhammad

Abstract

The aim of the reported work is to design and optimize electroactive species for energy storage applications. We report novel (Hafnium oxide)x – (Vanadium oxide)1-x electrode (x = 1, 0.75, 0.50, 0.25, 0), synthesized in different stoichiometric proportions, demonstrating outstanding performance as a supercapacitor. A comprehensive understanding of the underlying physical parameters has been achieved through structural and morphological characterizations. Subsequently, an in-depth electrochemical analysis has been performed via standard electrochemical characterization techniques of cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS). The reported electrode exhibited a notable energy density of 41.39 Wh kg−1 alongside a satisfactory power density of 255.58 W kg−1. Furthermore, nominated electrode demonstrated a remarkable capacitance retention of 88 % over 3000 cycles. Both, the choice of nanocomposite materials and the nanostructured architecture of the electrode proved pivotal for achieving high-performance supercapacitor electrode.

Suggested Citation

  • Mumtaz, Asifa & Iqbal, Javed & Mumtaz, Misbah & Oneeb, Muhammad, 2025. "Innovative hafnium oxide-vanadium oxide electrode with remarkably enhanced specific capacitance for supercapacitors," Energy, Elsevier, vol. 324(C).
    • Handle: RePEc:eee:energy:v:324:y:2025:i:c:s0360544225016846
    DOI: 10.1016/j.energy.2025.136042
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    References listed on IDEAS

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    1. Olabi, Abdul Ghani & Abbas, Qaisar & Al Makky, Ahmed & Abdelkareem, Mohammad Ali, 2022. "Supercapacitors as next generation energy storage devices: Properties and applications," Energy, Elsevier, vol. 248(C).
    2. Diana Lemian & Florin Bode, 2022. "Battery-Supercapacitor Energy Storage Systems for Electrical Vehicles: A Review," Energies, MDPI, vol. 15(15), pages 1-13, August.
    3. Ferreira, Helder Lopes & Garde, Raquel & Fulli, Gianluca & Kling, Wil & Lopes, Joao Pecas, 2013. "Characterisation of electrical energy storage technologies," Energy, Elsevier, vol. 53(C), pages 288-298.
    4. Sebastian Pohlmann, 2022. "Metrics and methods for moving from research to innovation in energy storage," Nature Communications, Nature, vol. 13(1), pages 1-5, December.
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