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This study explores the electrochemical performance of Nb2O5 rods coated on a graphite sheet as an electrode material for supercapacitors. The supercapacitive properties of Nb2O5 rods were further evaluated in a 6 M KOH electrolyte. In a 3E configuration, Nb2O5 rods exhibited a remarkable specific capacitance (Cs) of 237 F/g at a current density (CD) of 1 A/g. Additionally, they demonstrated a high Coulombic efficiency of 100% and excellent capacitance withholding of 92.45% after 1500 cycles at 15 A/g. The assembled Nb2O5 symmetric supercapacitor achieved a Cs of 98.6 F/g at 1 A/g, an energy density (ED) of 2.77 Wh/kg, and a power density (PD) of 2258.32 W/kg, while maintaining 99.3% capacitance retaining and 98.4% of Coulombic efficiency observed even after 1000 cycles at 20 A/g.

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Structural, Morphological, and Electrochemical Evaluation of Nb2O5 Rods for Supercapacitor Applications

  • 会议论文

  • 发表日期：

    2026年

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  • Aromal M. Vijay,
  • S. Gobalakrishnan,
  • N. Chidhambaram,
  • P. Sakthivel,
  • Perumal Asaithambi,
  • D. Shanmuga Sundar,
  • Arun Thirumurugan

摘要

This study explores the electrochemical performance of Nb2O5 rods coated on a graphite sheet as an electrode material for supercapacitors. The supercapacitive properties of Nb2O5 rods were further evaluated in a 6 M KOH electrolyte. In a 3E configuration, Nb2O5 rods exhibited a remarkable specific capacitance (Cs) of 237 F/g at a current density (CD) of 1 A/g. Additionally, they demonstrated a high Coulombic efficiency of 100% and excellent capacitance withholding of 92.45% after 1500 cycles at 15 A/g. The assembled Nb2O5 symmetric supercapacitor achieved a Cs of 98.6 F/g at 1 A/g, an energy density (ED) of 2.77 Wh/kg, and a power density (PD) of 2258.32 W/kg, while maintaining 99.3% capacitance retaining and 98.4% of Coulombic efficiency observed even after 1000 cycles at 20 A/g.