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<p>Vanadium pentoxide (V₂O₅) flakes were synthesized via a hydrothermal method by varying the amount of lemon juice (5&#xa0;mL for sample-1 and 10&#xa0;mL for sample-2) as a natural chelating agent. Structural and morphological analyses were performed using X-ray diffraction (XRD) and scanning electron microscopy (SEM), confirming crystalline V₂O₅ with flake-like morphologies influenced by chelating agent concentration. Electrochemical performance was evaluated using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) in a 3&#xa0;M KOH electrolyte. Sample-2 exhibited a Significantly higher Specific capacitance of 1536 F g⁻<sup>1</sup> (CV at 1&#xa0;mV&#xa0;s⁻<sup>1</sup>) and 212.37 F g⁻<sup>1</sup> (GCD at 1 A g⁻<sup>1</sup>) compared to sample-1, demonstrating that increasing lemon juice concentration enhances the capacitive behavior of V₂O₅ flakes by improving ion diffusion and electroactive surface area.</p>

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Effect of Chelating Agent Concentration on the Pseudocapacitive Performance of V2O5 Flakes Prepared by the Hydrothermal Process for Supercapacitor Applications

  • 期刊论文

  • 发表日期：

    2025年9月15日

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  • Sheik Abdul Sattar,
  • Kilari Naveen Kumar,
  • S K. Vinay,
  • Kotian Akshata Chandrakant,
  • G. V. Ashok Reddy,
  • R Imran Jafri,
  • Dhanalakshmi Radhalayam,
  • Nunna Guru  Prakash,
  • P. Rosaiah,
  • Atif Mossad Ali,
  • Tae Jo Ko

摘要

Vanadium pentoxide (V₂O₅) flakes were synthesized via a hydrothermal method by varying the amount of lemon juice (5 mL for sample-1 and 10 mL for sample-2) as a natural chelating agent. Structural and morphological analyses were performed using X-ray diffraction (XRD) and scanning electron microscopy (SEM), confirming crystalline V₂O₅ with flake-like morphologies influenced by chelating agent concentration. Electrochemical performance was evaluated using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) in a 3 M KOH electrolyte. Sample-2 exhibited a Significantly higher Specific capacitance of 1536 F g⁻1 (CV at 1 mV s⁻1) and 212.37 F g⁻1 (GCD at 1 A g⁻1) compared to sample-1, demonstrating that increasing lemon juice concentration enhances the capacitive behavior of V₂O₅ flakes by improving ion diffusion and electroactive surface area.