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<p>Herein, a binder-free Ni-containing MnCO<sub>3</sub> nanoplates-like electrode was successfully fabricated through a facile hydrothermal synthesis where the active material was directly developed on a three-dimensional nickel foam current collector. The nickel foam played a dual role, not only as a current collector but also as a nickel source, therefore initiating homogeneous nucleation and close adhesion of the Ni-containing MnCO<sub>3</sub> nanostructures. The electrode displayed exceptional electrochemical properties, including excellent Coulombic efficiency of approximately ~ 99% and a 67% capacitance retention of its initial capacitance after 6000 consecutive charge–discharge cycles, indicating excellent long-term cycling stability and reversibility. The electrode also displayed minimal charge-transfer resistance in impedance response, indicating rapid ion diffusion kinetics and good electrical conductivity. These cumulative electrochemical characteristics affirm that the binary synergistic hydroxide composition of nickel and manganese significantly enhances the overall performance, rendering the formulated material an excellent and promising candidate for high-performance supercapacitor applications.</p>

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Ni-containing MnCO3 nanoplates-like structure on 3D current collector for supercapacitors

  • 期刊论文

  • 发表日期：

    2026年2月19日

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  • Waqas Ul Arifeen,
  • Mohammad Nahidul Islam,
  • Karanpal Singh,
  • P. Rosaiah,
  • Abul Kalam,
  • Iftikhar Hussain,
  • Saood Ali

摘要

Herein, a binder-free Ni-containing MnCO3 nanoplates-like electrode was successfully fabricated through a facile hydrothermal synthesis where the active material was directly developed on a three-dimensional nickel foam current collector. The nickel foam played a dual role, not only as a current collector but also as a nickel source, therefore initiating homogeneous nucleation and close adhesion of the Ni-containing MnCO3 nanostructures. The electrode displayed exceptional electrochemical properties, including excellent Coulombic efficiency of approximately ~ 99% and a 67% capacitance retention of its initial capacitance after 6000 consecutive charge–discharge cycles, indicating excellent long-term cycling stability and reversibility. The electrode also displayed minimal charge-transfer resistance in impedance response, indicating rapid ion diffusion kinetics and good electrical conductivity. These cumulative electrochemical characteristics affirm that the binary synergistic hydroxide composition of nickel and manganese significantly enhances the overall performance, rendering the formulated material an excellent and promising candidate for high-performance supercapacitor applications.