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<p>With the rapid development of wearable electronic devices and flexible energy storage devices, planar micro-supercapacitors (MSCs) have attracted great attention as a new type of energy storage devices in industrial applications and scientific research. However, the complex fabrication process, weak substrate stability, and low specific capacitance of MSCs hinder their widespread application. In this work, we proposed a simple laser-induced graphene (LIG) to create rectangular electrode patterns on polyimide (PI) film substrate, succeeding in fabricating high-performance flexible planar MSCs. This approach offers a more convenient process flow and lower fabrication costs. Surprisingly, the MSCs exhibit good cycling characteristics and durability, with the area ratio of supercapacitors up to 25.18 mF cm-2 at a current density of 0.1&#xa0;mA cm-2. Furthermore, with increased energy density, the complex of supercapacitor devices was able to light a square alarm clock for about two minutes. Thanks to the high specific surface area and high conductivity of the unique crystal structure, the MSCs exhibit great potential applications in electronic information, flexible electronics, storage energy and other fields.</p>

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Fabrication of flexible planar micro-supercapacitors with high specific surface area by laser induced graphene

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • Dun Wu,
  • Zhaolei Li,
  • Dong Wang,
  • Jiaqi Liu,
  • Yuxin Chen,
  • Xiangyu Lu,
  • Junfeng Cheng,
  • Chunlin Liu

摘要

With the rapid development of wearable electronic devices and flexible energy storage devices, planar micro-supercapacitors (MSCs) have attracted great attention as a new type of energy storage devices in industrial applications and scientific research. However, the complex fabrication process, weak substrate stability, and low specific capacitance of MSCs hinder their widespread application. In this work, we proposed a simple laser-induced graphene (LIG) to create rectangular electrode patterns on polyimide (PI) film substrate, succeeding in fabricating high-performance flexible planar MSCs. This approach offers a more convenient process flow and lower fabrication costs. Surprisingly, the MSCs exhibit good cycling characteristics and durability, with the area ratio of supercapacitors up to 25.18 mF cm-2 at a current density of 0.1 mA cm-2. Furthermore, with increased energy density, the complex of supercapacitor devices was able to light a square alarm clock for about two minutes. Thanks to the high specific surface area and high conductivity of the unique crystal structure, the MSCs exhibit great potential applications in electronic information, flexible electronics, storage energy and other fields.