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<p>The copper oxide (CuO) structures were directly prepared on a flexible stainless-steel (SS) mesh substrate via a simple one-step process with an aqueous solution of copper acetate monohydrate and hexamethylenetetramine (HMT) at a growth temperature of 60&#xa0;°C. The three-dimensional (3D) sphere-like structures composed of one-dimensional (1D) sub-level rod-like nanostructures fully covered the SS mesh surface with addition of HMT, which led to enhanced electrochemical performance. Areal specific capacitance of ~ 47.1 and ~ 36.3&#xa0;mF/cm<sup>2</sup> were obtained at a cyclic voltammetry (CV) scan rates of 2 and 100&#xa0;mV/s, respectively, demonstrating a high rate capability of ~ 77%. Further, it exhibited a good cycling capacitance retention of ~ 91% after 1000 cycles at a scan rate of 50&#xa0;mV/s. Hence, using a cost-effective wet chemical method at a relatively low growth temperature, entirely binder-free the sphere-like CuO structures on SS mesh substrate could serve as an electrode for energy storage devices.</p> Graphical abstract <p></p>

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Electrochemical performance of sphere-like copper oxide structures on stainless-steel mesh substrate

  • 期刊论文

  • 发表日期：

    2026年7月7日

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  • Kyung Ho Kim,
  • Gouki Asakura

摘要

The copper oxide (CuO) structures were directly prepared on a flexible stainless-steel (SS) mesh substrate via a simple one-step process with an aqueous solution of copper acetate monohydrate and hexamethylenetetramine (HMT) at a growth temperature of 60 °C. The three-dimensional (3D) sphere-like structures composed of one-dimensional (1D) sub-level rod-like nanostructures fully covered the SS mesh surface with addition of HMT, which led to enhanced electrochemical performance. Areal specific capacitance of ~ 47.1 and ~ 36.3 mF/cm2 were obtained at a cyclic voltammetry (CV) scan rates of 2 and 100 mV/s, respectively, demonstrating a high rate capability of ~ 77%. Further, it exhibited a good cycling capacitance retention of ~ 91% after 1000 cycles at a scan rate of 50 mV/s. Hence, using a cost-effective wet chemical method at a relatively low growth temperature, entirely binder-free the sphere-like CuO structures on SS mesh substrate could serve as an electrode for energy storage devices.

Graphical abstract