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Abstract <p>The growing global demand for energy necessitates the development of efficient and durable electrode materials for high-performance supercapacitors. In this study, bimetallic neodymium oxide–vanadium pentoxide (Nd<sub>2</sub>O<sub>3</sub>-V<sub>2</sub>O<sub>5</sub>) nanocomposites (NCs) were synthesized via a simple solution combustion method. Structural and morphological analyses confirmed the formation of a well-integrated composite with uniform particle distribution, high crystallinity, and enhanced structural stability. Incorporation of Nd<sub>2</sub>O<sub>3</sub> into the V<sub>2</sub>O<sub>5</sub> framework significantly improved the electrical conductivity and redox reversibility, thereby facilitating efficient ion diffusion and electron transport. Electrochemical investigations revealed a high specific capacitance of 813&#xa0;F&#xa0;g⁻<sup>1</sup> at a current density of 1&#xa0;A&#xa0;g⁻<sup>1</sup>, along with excellent charge–discharge reversibility. The fabricated asymmetric supercapacitor (ASC), employing Nd<sub>2</sub>O<sub>3</sub>-V<sub>2</sub>O<sub>5</sub> as the positive electrode, delivered an energy density of 40.3&#xa0;Wh&#xa0;kg⁻<sup>1</sup> at a power density of 5999&#xa0;W&#xa0;kg⁻<sup>1</sup> and retained 95.3% of its capacitance with 90% coulombic efficiency after 5000&#xa0;cycles. The outstanding electrochemical performance is attributed to the synergistic interaction between Nd and V species, which promotes rapid redox kinetics and robust structural integrity. These findings highlight Nd<sub>2</sub>O<sub>3</sub>-V<sub>2</sub>O<sub>5</sub> nanocomposites as promising candidates for next-generation asymmetric supercapacitor applications.</p> Graphical abstract <p></p>

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Bimetallic Nd2O3-V2O5 nanocomposites as stable and high-capacitance electrodes for asymmetric supercapacitor application

  • 期刊论文

  • 发表日期：

    2025年11月9日

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  • Wafa Al-Gethami,
  • Mohammad Shariq,
  • Eman M. Alshehri,
  • Samar Al-Shehri,
  • Hajer Adam,
  • Walaa S. Alsaidi,
  • F. A. Al-Marhaby,
  • Eman Almutib,
  • Noha Al-Qasmi

摘要

Abstract

The growing global demand for energy necessitates the development of efficient and durable electrode materials for high-performance supercapacitors. In this study, bimetallic neodymium oxide–vanadium pentoxide (Nd2O3-V2O5) nanocomposites (NCs) were synthesized via a simple solution combustion method. Structural and morphological analyses confirmed the formation of a well-integrated composite with uniform particle distribution, high crystallinity, and enhanced structural stability. Incorporation of Nd2O3 into the V2O5 framework significantly improved the electrical conductivity and redox reversibility, thereby facilitating efficient ion diffusion and electron transport. Electrochemical investigations revealed a high specific capacitance of 813 F g⁻1 at a current density of 1 A g⁻1, along with excellent charge–discharge reversibility. The fabricated asymmetric supercapacitor (ASC), employing Nd2O3-V2O5 as the positive electrode, delivered an energy density of 40.3 Wh kg⁻1 at a power density of 5999 W kg⁻1 and retained 95.3% of its capacitance with 90% coulombic efficiency after 5000 cycles. The outstanding electrochemical performance is attributed to the synergistic interaction between Nd and V species, which promotes rapid redox kinetics and robust structural integrity. These findings highlight Nd2O3-V2O5 nanocomposites as promising candidates for next-generation asymmetric supercapacitor applications.

Graphical abstract