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<p>High-performance supercapacitors are critical for next-generation energy storage systems, necessitating exceptional cycling stability along with elevated power and energy densities. This research explores; we outline a pioneering approach for the development of CuMn<sub>2</sub>O<sub>4</sub>/MnO<sub>2</sub>@MWCNT electrodes specifically designed for supercapacitor applications. The unique hierarchical structure of CuMn<sub>2</sub>O<sub>4</sub>/MnO<sub>2</sub>, when combined with the porous framework of MWCNTs, leads to a substantial enhancement in charge storage capacity and ion accessibility. The synergistic interaction between CuMn<sub>2</sub>O<sub>4</sub> and MnO<sub>2</sub> optimizes demonstrating hybrid charge storage behavior, resulting in a remarkable improvement in overall specific capacitance. The CuMn<sub>2</sub>O<sub>4</sub>/MnO<sub>2</sub>@MWCNT composites deliver a specific capacitance of 1680 F g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup>. We also developed an ASC device utilizing CuMn<sub>2</sub>O<sub>4</sub>/MnO<sub>2</sub>@MWCNT and activated carbon as the positive and negative electrodes, achieving a superior energy density of 51.09 Wh/kg at a power density of 800 W/kg. Moreover, the ASC demonstrates outstanding cycling performance, retaining 98% of its specific capacitance maintained after 10,000 cycles. The data reveal the capability of CuMn<sub>2</sub>O<sub>4</sub>/MnO<sub>2</sub>@MWCNT-based hybrid capacitors for advancing future energy storage technologies.</p>

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Enhanced performance of asymmetric hybrid capacitors via hydrothermal synthesis of MWCNT-embedded CuMn2O4/MnO2 composite as a high-efficiency positive electrode

  • 期刊论文

  • 发表日期：

    2025年10月16日

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  • S. Parthiban,
  • A. Kiruthiga,
  • S. S. Karthikeyan,
  • N. Vijayakumar

摘要

High-performance supercapacitors are critical for next-generation energy storage systems, necessitating exceptional cycling stability along with elevated power and energy densities. This research explores; we outline a pioneering approach for the development of CuMn2O4/MnO2@MWCNT electrodes specifically designed for supercapacitor applications. The unique hierarchical structure of CuMn2O4/MnO2, when combined with the porous framework of MWCNTs, leads to a substantial enhancement in charge storage capacity and ion accessibility. The synergistic interaction between CuMn2O4 and MnO2 optimizes demonstrating hybrid charge storage behavior, resulting in a remarkable improvement in overall specific capacitance. The CuMn2O4/MnO2@MWCNT composites deliver a specific capacitance of 1680 F g−1 at a current density of 1 A g−1. We also developed an ASC device utilizing CuMn2O4/MnO2@MWCNT and activated carbon as the positive and negative electrodes, achieving a superior energy density of 51.09 Wh/kg at a power density of 800 W/kg. Moreover, the ASC demonstrates outstanding cycling performance, retaining 98% of its specific capacitance maintained after 10,000 cycles. The data reveal the capability of CuMn2O4/MnO2@MWCNT-based hybrid capacitors for advancing future energy storage technologies.