Scholarlink

<p>The synthesis of economical nanocomposites for energy preservation technologies, particularly supercapacitors, has drawn significant research interest. The use of biomass-derived carbon offers a more cost-effective and effective synthesis approach than expensive commercial carbon sources, making it suitable for extensive energy applications.In this study, active carbon obtained from walnut shells (ACWS) was synthesized through KOH activation, which was then combined with NiMn<sub>2</sub>O<sub>4</sub>, among the most beneficial spinel metal oxides, to evaluate electrode material’s effectiveness in energy conservation. NiMn<sub>2</sub>O<sub>4</sub>/ACWS showed specific capacitance (C<sub>s</sub>) of 846.15 F g<sup>−1</sup>, while investigation indicated energy density (E<sub>d</sub>) of 18.42 Wh kg<sup>−1</sup> and high-power density (P<sub>d</sub>) of 206 W&#xa0;kg<sup>−1</sup> at 1 A&#xa0;g<sup>−1</sup>. A low solution resistance (R<sub>s</sub>) value (0.74 Ω) seen in Nyquist diagram indicated remarkable conductivity of NiMn<sub>2</sub>O<sub>4</sub>/ACWS. Additionally, revealed remarkable stability in a KOH&#xa0;electrolyte (3.0&#xa0;M KOH) throughout 3000<sup>th</sup> cycles of cyclic voltammetry. An asymmetric two-electrode investigation was also carried out, and the results demonstrated an enhanced E<sub>d</sub> of 57.51&#xa0;Wh&#xa0;kg<sup>−1</sup> and P<sub>d</sub> of 714&#xa0;W&#xa0;kg<sup>−1</sup>. Based on this study, NiMn<sub>2</sub>O<sub>4</sub>/ACWS is a viable and inexpensive electrode material for supercapacitor application in future.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Sustainable hydrothermal synthesis of NiMn2O4/ACWS nanocomposites derived from walnut shells for advanced supercapacitor applications

  • 期刊论文

  • 发表日期：

    2026年7月9日

查看全文
  • Muhammad Khan,
  • B. M. Alotaibi,
  • Albandari .W. Alrowaily,
  • Haifa A. Alyousef,
  • Abhinav Kumar,
  • Hala M. Abo-Dief,
  • Rizwan Ul Hassan

摘要

The synthesis of economical nanocomposites for energy preservation technologies, particularly supercapacitors, has drawn significant research interest. The use of biomass-derived carbon offers a more cost-effective and effective synthesis approach than expensive commercial carbon sources, making it suitable for extensive energy applications.In this study, active carbon obtained from walnut shells (ACWS) was synthesized through KOH activation, which was then combined with NiMn2O4, among the most beneficial spinel metal oxides, to evaluate electrode material’s effectiveness in energy conservation. NiMn2O4/ACWS showed specific capacitance (Cs) of 846.15 F g−1, while investigation indicated energy density (Ed) of 18.42 Wh kg−1 and high-power density (Pd) of 206 W kg−1 at 1 A g−1. A low solution resistance (Rs) value (0.74 Ω) seen in Nyquist diagram indicated remarkable conductivity of NiMn2O4/ACWS. Additionally, revealed remarkable stability in a KOH electrolyte (3.0 M KOH) throughout 3000th cycles of cyclic voltammetry. An asymmetric two-electrode investigation was also carried out, and the results demonstrated an enhanced Ed of 57.51 Wh kg−1 and Pd of 714 W kg−1. Based on this study, NiMn2O4/ACWS is a viable and inexpensive electrode material for supercapacitor application in future.