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

    7 Citations (Scopus)

    Abstract

    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
    PublisherSPIE
    ISBN (Electronic)9781510606258
    DOIs
    Publication statusPublished - 2017
    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
    Volume10092
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X

    Other

    OtherLaser-Based Micro- and Nanoprocessing XI 2017
    Country/TerritoryUnited States
    CitySan Francisco
    Period17/1/3117/2/2

    Keywords

    • 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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