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<p>Developing high-performance supercapacitors requires electrode materials with enhanced energy storage capacity, excellent cycling stability and fast charge transport. Achieving this necessitates innovative nanostructures with high surface area, low resistance and long-term durability. In this study, NiWO<sub>4</sub> nanocube-decorated NiCo<sub>2</sub>O<sub>4</sub> nanorods are synthesized on nickel foam, forming a well-engineered nanostructure that enhances charge transport and electrochemical performance. The NiCo<sub>2</sub>O<sub>4</sub>/NiWO<sub>4</sub>-positive electrode delivers an impressive specific capacitance of 1972 F g<sup>−1</sup> at 1 A g<sup>−1</sup>, retaining 96% of its capacitance after 10,000 cycles. An asymmetric supercapacitor is assembled using NiCo<sub>2</sub>O<sub>4</sub>/NiWO<sub>4</sub> as the positive electrode and activated carbon as the negative electrode, achieving a high energy density of 39.4 Wh kg<sup>−1</sup> at a power density of 1182 W kg<sup>−1</sup>. These results highlight the potential of NiWO<sub>4</sub>-decorated NiCo<sub>2</sub>O<sub>4</sub> nanorods for next-generation high-performance supercapacitors.</p>

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NiWO4 nanocube-decorated NiCo2O4 nanorods as a positive electrode with an activated carbon negative electrode for high-performance asymmetric capacitors applications

  • 期刊论文

  • 发表日期：

    2025年6月16日

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  • Muhammadu Sathik Raja,
  • S. Balachandran,
  • L. Ganesh Babu,
  • V. P. Suresh Kumar,
  • Beporam Iftekhar Hussain,
  • R. Girimurugan,
  • N. Vijayakumar

摘要

Developing high-performance supercapacitors requires electrode materials with enhanced energy storage capacity, excellent cycling stability and fast charge transport. Achieving this necessitates innovative nanostructures with high surface area, low resistance and long-term durability. In this study, NiWO4 nanocube-decorated NiCo2O4 nanorods are synthesized on nickel foam, forming a well-engineered nanostructure that enhances charge transport and electrochemical performance. The NiCo2O4/NiWO4-positive electrode delivers an impressive specific capacitance of 1972 F g−1 at 1 A g−1, retaining 96% of its capacitance after 10,000 cycles. An asymmetric supercapacitor is assembled using NiCo2O4/NiWO4 as the positive electrode and activated carbon as the negative electrode, achieving a high energy density of 39.4 Wh kg−1 at a power density of 1182 W kg−1. These results highlight the potential of NiWO4-decorated NiCo2O4 nanorods for next-generation high-performance supercapacitors.