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<p>Copper nanowires (CuNW) are a promising material for supercapacitor electrodes due to their unique properties, including enhanced flexibility, high aspect ratio, and high electrical conductivity. At the same time, this layer, featuring lightweight capacitive materials, exhibits improved functional behaviour. However, variations in this behaviour are observed due to limited capacitance (reduced intrinsic capacitance) and poor structural integrity. This study developed and analyzed CuNW/rGO/MXene/CNT composite electrode, synthesized using a spray-coating technique followed by thermally annealing at 120&#xa0;°C in an inert environment to prevent oxidation. The electrode simulations were meticulously optimized to enhance conductivity, capacitance, and power density, while ensuring superior cycling stability and low sheet resistance. The 15:40:40:5 CuNW:rGO:MXene:CNT composition showed optimal performance with the observed sheet resistance of 11.6 Ω sq<sup>−1</sup>, specific capacitance of 410 F g<sup>−1</sup>, and conductivity of 2.7 × 10<sup>5</sup> S m<sup>−1</sup>. This hybrid composition retained 93% of its initial capacitance after 6000 cycles. The power density and energy density were measured as 2600 W kg<sup>−1</sup> and 55 Wh kg<sup>−1</sup>. This optimized composition exhibited a favourable balance between specific capacitance, energy density, and endurance during repeated charge–discharge cycles, highlighting its suitability in flexible energy storage applications.</p>

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Enhancement of conductivity and stable cycling action, and reduction of energy density of flexible electrode for Li-ion supercapacitor configured with copper nanowire/MXene/graphene/CNT hybrid electrodes

  • 期刊论文

  • 发表日期：

    2026年3月12日

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  • M. Aruna,
  • N. Nagabhooshanam,
  • Sharad Rathore,
  • Ankur Kulshreshta,
  • CSantha Sheela,
  • Dokiburra Beulah,
  • Ramya Maranan,
  • T. Thirugnanasambandham,
  • Barun Haldar

摘要

Copper nanowires (CuNW) are a promising material for supercapacitor electrodes due to their unique properties, including enhanced flexibility, high aspect ratio, and high electrical conductivity. At the same time, this layer, featuring lightweight capacitive materials, exhibits improved functional behaviour. However, variations in this behaviour are observed due to limited capacitance (reduced intrinsic capacitance) and poor structural integrity. This study developed and analyzed CuNW/rGO/MXene/CNT composite electrode, synthesized using a spray-coating technique followed by thermally annealing at 120 °C in an inert environment to prevent oxidation. The electrode simulations were meticulously optimized to enhance conductivity, capacitance, and power density, while ensuring superior cycling stability and low sheet resistance. The 15:40:40:5 CuNW:rGO:MXene:CNT composition showed optimal performance with the observed sheet resistance of 11.6 Ω sq−1, specific capacitance of 410 F g−1, and conductivity of 2.7 × 105 S m−1. This hybrid composition retained 93% of its initial capacitance after 6000 cycles. The power density and energy density were measured as 2600 W kg−1 and 55 Wh kg−1. This optimized composition exhibited a favourable balance between specific capacitance, energy density, and endurance during repeated charge–discharge cycles, highlighting its suitability in flexible energy storage applications.