Carbon nanotube 3D current collectors for lightweight, high performance and low cost supercapacitor electrodes

Ricardo Quintero, Dong Young Kim, Kei Hasegawa, Yuki Yamada, Atsuo Yamada, Suguru Noda

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    Self-supporting hybrid electrodes were fabricated through the systematic combination of activated carbon (AC), a low cost capacitive material, with sub-millimetre long few-wall carbon nanotubes (FWCNTs). After an easy three-step (mixing, dispersion and filtration) process, robust self-supporting films were obtained, comprising 90% AC particles wrapped in a 3-dimensional FWCNT collector. The 10% FWCNTs provide electrical conductivity and mechanical strength, and replace heavier metal collectors. The FWCNT matrix effectively improved the capacitance of the inexpensive, high surface area AC to 169 F g-1 at a slow scan rate of 5 mV s-1, and to 131 F g -1 at a fast scan rate of 100 mV s-1, in fairly thick (∼200 μm) electrodes. Connection to a metallic collector at the film edge only, which significantly reduced the use of metal, retained much larger capacitance for the AC-FWCNT hybrid film (107 F g-1) than for the conventional AC electrode with binder and conductive filler (3.9 F g -1) at a practical voltage scan rate, 100 mV s-1. Transport measurements in three- and two-electrode cells show that the FWCNT matrix can greatly enhance the conductivity of the AC-based films.

    Original languageEnglish
    Pages (from-to)8230-8237
    Number of pages8
    JournalRSC Advances
    Volume4
    Issue number16
    DOIs
    Publication statusPublished - 2014

    Fingerprint

    Carbon Nanotubes
    Activated carbon
    Carbon nanotubes
    Electrodes
    Costs
    Capacitance
    Heavy Metals
    Heavy metals
    Strength of materials
    Binders
    Supercapacitor
    Fillers
    Metals
    Electric potential

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Chemistry(all)

    Cite this

    Carbon nanotube 3D current collectors for lightweight, high performance and low cost supercapacitor electrodes. / Quintero, Ricardo; Kim, Dong Young; Hasegawa, Kei; Yamada, Yuki; Yamada, Atsuo; Noda, Suguru.

    In: RSC Advances, Vol. 4, No. 16, 2014, p. 8230-8237.

    Research output: Contribution to journalArticle

    Quintero, Ricardo ; Kim, Dong Young ; Hasegawa, Kei ; Yamada, Yuki ; Yamada, Atsuo ; Noda, Suguru. / Carbon nanotube 3D current collectors for lightweight, high performance and low cost supercapacitor electrodes. In: RSC Advances. 2014 ; Vol. 4, No. 16. pp. 8230-8237.
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