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<p>Here, we studied the synthesis and electrochemical behavior of Ni-In(OH)<sub>3</sub> nanosheets as electrode materials for supercapacitors. Ni-In(OH)<sub>3</sub> nanosheets were directly grown on nickel foam (NF) through a simple hydrothermal method, resulting in a porous nanosheet architecture with abundant electroactive sites and efficient charge transport pathways. The Ni-In(OH)<sub>3</sub> nanosheets exhibited excellent pseudocapacitive behavior with a high specific capacitance of 968&#xa0;F g⁻¹ and a specific capacity of 387&#xa0;C g⁻¹ at 1&#xa0;A g⁻¹. With an increase in current density, the material exhibited good rate capability, retaining a capacitance of 350&#xa0;F g⁻¹ at 10&#xa0;A g⁻¹. Long-term stability tests revealed that the material retained 89.7% of its initial capacitance after 4000 cycles, with a Coulombic efficiency of almost 100%, confirming excellent cycling stability and highly reversible charge–discharge behavior. The superior electrochemical performance is attributed to the porous nanosheet morphology, which facilitates rapid ion diffusion, provides a large electrochemically active surface area, and promotes efficient electron transport. These findings demonstrate that Ni-In(OH)<sub>3</sub> is a promising electrode material for high-performance supercapacitors, offering high capacitance, good rate capability, and excellent long-term stability.</p>

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Ni-In(OH)3 nanosheets-like structure on 3D current collector for supercapacitors

  • 期刊论文

  • 发表日期：

    2026年7月30日

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  • Tensangmu Lama Tamang,
  • Karanpal Singh,
  • Mohammad Nahidul Islam,
  • P. Rosaiah,
  • Anees A. Ansari,
  • Muhammad Faizan,
  • Iftikhar Hussain

摘要

Here, we studied the synthesis and electrochemical behavior of Ni-In(OH)3 nanosheets as electrode materials for supercapacitors. Ni-In(OH)3 nanosheets were directly grown on nickel foam (NF) through a simple hydrothermal method, resulting in a porous nanosheet architecture with abundant electroactive sites and efficient charge transport pathways. The Ni-In(OH)3 nanosheets exhibited excellent pseudocapacitive behavior with a high specific capacitance of 968 F g⁻¹ and a specific capacity of 387 C g⁻¹ at 1 A g⁻¹. With an increase in current density, the material exhibited good rate capability, retaining a capacitance of 350 F g⁻¹ at 10 A g⁻¹. Long-term stability tests revealed that the material retained 89.7% of its initial capacitance after 4000 cycles, with a Coulombic efficiency of almost 100%, confirming excellent cycling stability and highly reversible charge–discharge behavior. The superior electrochemical performance is attributed to the porous nanosheet morphology, which facilitates rapid ion diffusion, provides a large electrochemically active surface area, and promotes efficient electron transport. These findings demonstrate that Ni-In(OH)3 is a promising electrode material for high-performance supercapacitors, offering high capacitance, good rate capability, and excellent long-term stability.