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<p>A simple hydrothermal approach was employed to successfully create spinel NiMn<sub>2</sub>O<sub>4</sub> nanosheets on a 3D nickel foam. The porous NiMn<sub>2</sub>O<sub>4</sub> NSs@NF electrode, which employs highly conductive nickel foam, not only provides good ion-transport routes and a plethora of accessible active sites. At 1 Ag<sup>−1</sup>, the fabricated NiMn<sub>2</sub>O<sub>4</sub> NSs@NF exhibits a specific capacitance of 770.7 Fg<sup>−1</sup>, a rate capability of 84.6%, and excellent capacitance maintenance of 94.5% after 10,000 cycles. These results recommend that the electrode has intriguing future applications as a supercapacitor. In addition, the asymmetric device was made using activated carbon (negative electrode) and NiMn<sub>2</sub>O<sub>4</sub> NSs (positive electrode). In a 1&#xa0;M KOH electrolyte, the ASC device produces a ED of 50.5 Whkg<sup>−1</sup> and PD of 324.5 Wkg<sup>−1</sup>.</p>

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Fabrication of porous NiMn2O4 nanosheets on nickel foam as advanced electrodes for supercapacitors

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • S. Jagan Raj,
  • G. Raja,
  • C. Vanitha,
  • P. Rajeswaran

摘要

A simple hydrothermal approach was employed to successfully create spinel NiMn2O4 nanosheets on a 3D nickel foam. The porous NiMn2O4 NSs@NF electrode, which employs highly conductive nickel foam, not only provides good ion-transport routes and a plethora of accessible active sites. At 1 Ag−1, the fabricated NiMn2O4 NSs@NF exhibits a specific capacitance of 770.7 Fg−1, a rate capability of 84.6%, and excellent capacitance maintenance of 94.5% after 10,000 cycles. These results recommend that the electrode has intriguing future applications as a supercapacitor. In addition, the asymmetric device was made using activated carbon (negative electrode) and NiMn2O4 NSs (positive electrode). In a 1 M KOH electrolyte, the ASC device produces a ED of 50.5 Whkg−1 and PD of 324.5 Wkg−1.