Laser direct writing of carbon/Au composite electrodes for high-performance micro-supercapacitors

Jinguang Cai, Akira Watanabe, Chao Lv

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


Micro-supercapacitors with small size, light weight, flexibility while maintaining high energy and power output are required for portable miniaturized electronics. The fabrication methods and materials should be cost-effective, scalable, and easily integrated to current electronic industry. Carbon materials have required properties for high-performance flexible supercapacitors, including high specific surface areas, electrochemical stability, and high electrical conductivity, as well as the high mechanical tolerance. Laser direct writing method is a non-contact, efficient, single-step fabrication technique without requirements of masks, post-processing, and complex clean room, which is a useful patterning technique, and can be easily integrated with current electronic product lines for commercial use. Previously we have reported micro-supercapacitors fabricated by laser direct writing on polyimide films in air or Ar, which showed highcapacitive performance. However, the conductivity of the carbon materials is still low for fast charge-discharge use. Here, we demonstrated the fabrication of flexible carbon/Au composite high-performance MSCs by first laser direct writing on commercial polyimide films followed by spin-coating Au nanoparticles ink and second in-situ laser direct writing using the low-cost semiconductor laser. As-prepared micro-supercapacitors show an improved conductivity and capacitance of 1.17 mF/cm2 at a high scanning rate of 10,000 mV/s, which is comparable to the reported capacitance of carbon-based micro-supercapacitors. In addition, the micro-supercapacitors have high bend tolerance and long-cycle stability.

Original languageEnglish
Title of host publicationLaser-Based Micro- and Nanoprocessing XI
EditorsUdo Klotzbach, Rainer Kling, Kunihiko Washio
ISBN (Electronic)9781510606258
Publication statusPublished - 2017 Jan 1
EventLaser-Based Micro- and Nanoprocessing XI 2017 - San Francisco, United States
Duration: 2017 Jan 312017 Feb 2

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherLaser-Based Micro- and Nanoprocessing XI 2017
CountryUnited States
CitySan Francisco


  • Laser direct writing
  • carbon materials
  • carbon/Au composite electrodes
  • laser carbonization
  • layer-by-layer laser direct writing
  • micro-supercapacitor
  • polyimide carbonization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Cai, J., Watanabe, A., & Lv, C. (2017). Laser direct writing of carbon/Au composite electrodes for high-performance micro-supercapacitors. In U. Klotzbach, R. Kling, & K. Washio (Eds.), Laser-Based Micro- and Nanoprocessing XI [100920P] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10092). SPIE.