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<p>To address the energy storage needs of wearable electronics, this study developed high-performance, flexible micro-supercapacitors (MSCs) using 2D and 3D patterned fabric-based microelectrodes. The 2D electrodes were created via a screen-printing method with an omnidirectional pre-stretching strategy, while 3D array-structured electrodes were formed through electrostatic actuation. Nano-MnO<sub>2</sub> and Na<sub>0.77</sub>MnO<sub>2</sub> were deposited to enhance pseudo-capacitive storage and widen the electrochemical window. The C-C/MnO<sub>2</sub>-based MSCs exhibited a 21% pseudo-capacitance ratio, achieving an area-specific capacitance of 118.2 mF cm<sup>−2</sup> at 5 mV s<sup>−1</sup> and an energy density of 39.25 mWh cm<sup>−2</sup> at 0.21 mW cm<sup>−2</sup>. These MSCs maintained 95.05%, 92.04%, and 89.74% of their capacitance under stretched, twisted, and folded conditions, respectively, and showed stable performance across temperatures from −20 °C to 60 °C. Additionally, C-C/Na<sub>0.77</sub>MnO<sub>2</sub>-based MSCs extended the electrochemical window to 1.6 V and retained 100.2% capacitance after 6500 cycles. This work offers innovative strategies for advancing portable and wearable electronic devices.</p>

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3D patterned fabric-based wearable micro-supercapacitor operating at high voltage by electrostatic actuation

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月2日

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  • Xiaoping Lin,
  • Shangbo Li,
  • Xiaoyan Li,
  • Xuming Huang,
  • Luhua Jia,
  • Wei Zhang,
  • Zaisheng Cai,
  • Gunel Imanova,
  • Sridhar Komarneni

摘要

To address the energy storage needs of wearable electronics, this study developed high-performance, flexible micro-supercapacitors (MSCs) using 2D and 3D patterned fabric-based microelectrodes. The 2D electrodes were created via a screen-printing method with an omnidirectional pre-stretching strategy, while 3D array-structured electrodes were formed through electrostatic actuation. Nano-MnO2 and Na0.77MnO2 were deposited to enhance pseudo-capacitive storage and widen the electrochemical window. The C-C/MnO2-based MSCs exhibited a 21% pseudo-capacitance ratio, achieving an area-specific capacitance of 118.2 mF cm−2 at 5 mV s−1 and an energy density of 39.25 mWh cm−2 at 0.21 mW cm−2. These MSCs maintained 95.05%, 92.04%, and 89.74% of their capacitance under stretched, twisted, and folded conditions, respectively, and showed stable performance across temperatures from −20 °C to 60 °C. Additionally, C-C/Na0.77MnO2-based MSCs extended the electrochemical window to 1.6 V and retained 100.2% capacitance after 6500 cycles. This work offers innovative strategies for advancing portable and wearable electronic devices.