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<p>Two-dimensional electrodes have recently garnered significant interest due to their unique layered structures, excellent capacitive properties, and high packing densities. This study outlines the liquid-phase exfoliation technique used to produce La₂O₃-h-BN nanocomposites. Lanthanum oxide (La<sub>2</sub>O<sub>3</sub>) was synthesized, and to enhance supercapacitor performance through a synergistic effect, 2D hexagonal boron nitride (h-BN) was incorporated. The resulting nanocomposites were analysed using XRD, FTIR, SEM, EDAX, HR-TEM, SAED, BET, and XPS methodologies. The La<sub>2</sub>O<sub>3</sub>-h-BN electrodes, designed for supercapacitor applications, achieved a specific capacitance of 412 F/g at a current density of 0.5 A/g. The electrode also demonstrated remarkable cyclic stability, retaining 86% of its capacitance even after 3000 charge/discharge cycles at 4 A/g. An asymmetric supercapacitor device was fabricated using La<sub>2</sub>O<sub>3</sub>-h-BN as the positive electrode and activated carbon as the negative electrode. This device exhibited a peak energy density of 59 Wh/kg at a power density of 1805 W/kg, maintained 91% capacitance retention after 2000 cycles at 4 A/g, and demonstrated a noteworthy coulombic efficiency of 90%.Therefore, the developed La₂O₃-h-BN electrode material presents exciting prospects for use as a potential electrode in future energy storage technologies.</p> Graphical Abstract <p></p>

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Nanoengineering of hexagonal boron nitride (h-BN) decorated on La2O3 nanocomposite as an efficient electrode material for asymmetric supercapacitor application

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • Z. Mohamed Riyas,
  • S. Sharmila,
  • P. Priya,
  • M. Ramesh Prabhu

摘要

Two-dimensional electrodes have recently garnered significant interest due to their unique layered structures, excellent capacitive properties, and high packing densities. This study outlines the liquid-phase exfoliation technique used to produce La₂O₃-h-BN nanocomposites. Lanthanum oxide (La2O3) was synthesized, and to enhance supercapacitor performance through a synergistic effect, 2D hexagonal boron nitride (h-BN) was incorporated. The resulting nanocomposites were analysed using XRD, FTIR, SEM, EDAX, HR-TEM, SAED, BET, and XPS methodologies. The La2O3-h-BN electrodes, designed for supercapacitor applications, achieved a specific capacitance of 412 F/g at a current density of 0.5 A/g. The electrode also demonstrated remarkable cyclic stability, retaining 86% of its capacitance even after 3000 charge/discharge cycles at 4 A/g. An asymmetric supercapacitor device was fabricated using La2O3-h-BN as the positive electrode and activated carbon as the negative electrode. This device exhibited a peak energy density of 59 Wh/kg at a power density of 1805 W/kg, maintained 91% capacitance retention after 2000 cycles at 4 A/g, and demonstrated a noteworthy coulombic efficiency of 90%.Therefore, the developed La₂O₃-h-BN electrode material presents exciting prospects for use as a potential electrode in future energy storage technologies.

Graphical Abstract