Hierarchical networks of redox-active reduced crumpled graphene oxide and functionalized few-walled carbon nanotubes for rapid electrochemical energy storage

Byeongyong Lee, Chongmin Lee, Tianyuan Liu, Kwangsup Eom, Zhongming Chen, Suguru Noda, Thomas F. Fuller, Hee Dong Jang, Seung Woo Lee

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    Crumpled graphene is known to have a strong aggregation-resistive property due to its unique 3D morphology, providing a promising solution to prevent the restacking issue of graphene based electrode materials. Here, we demonstrate the utilization of redox-active oxygen functional groups on the partially reduced crumpled graphene oxide (r-CGO) for electrochemical energy storage applications. To effectively utilize the surface redox reactions of the functional groups, hierarchical networks of electrodes including r-CGO and functionalized few-walled carbon nanotubes (f-FWNTs) are assembled via a vacuum-filtration process, resulting in a 3D porous structure. These composite electrodes are employed as positive electrodes in Li-cells, delivering high gravimetric capacities of up to ∼170 mA h g-1 with significantly enhanced rate-capability compared to the electrodes consisting of conventional 2D reduced graphene oxide and f-FWNTs. These results highlight the importance of microstructure design coupled with oxygen chemistry control, to maximize the surface redox reactions on functionalized graphene based electrodes.

    Original languageEnglish
    Pages (from-to)12330-12338
    Number of pages9
    JournalNanoscale
    Volume8
    Issue number24
    DOIs
    Publication statusPublished - 2016 Jun 28

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    Carbon Nanotubes
    Graphite
    Energy storage
    Oxides
    Graphene
    Carbon nanotubes
    Electrodes
    Redox reactions
    Functional groups
    Oxygen
    Oxidation-Reduction
    Reactive Oxygen Species
    Agglomeration
    Vacuum
    Microstructure
    Composite materials

    ASJC Scopus subject areas

    • Materials Science(all)

    Cite this

    Hierarchical networks of redox-active reduced crumpled graphene oxide and functionalized few-walled carbon nanotubes for rapid electrochemical energy storage. / Lee, Byeongyong; Lee, Chongmin; Liu, Tianyuan; Eom, Kwangsup; Chen, Zhongming; Noda, Suguru; Fuller, Thomas F.; Jang, Hee Dong; Lee, Seung Woo.

    In: Nanoscale, Vol. 8, No. 24, 28.06.2016, p. 12330-12338.

    Research output: Contribution to journalArticle

    Lee, Byeongyong ; Lee, Chongmin ; Liu, Tianyuan ; Eom, Kwangsup ; Chen, Zhongming ; Noda, Suguru ; Fuller, Thomas F. ; Jang, Hee Dong ; Lee, Seung Woo. / Hierarchical networks of redox-active reduced crumpled graphene oxide and functionalized few-walled carbon nanotubes for rapid electrochemical energy storage. In: Nanoscale. 2016 ; Vol. 8, No. 24. pp. 12330-12338.
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    AU - Eom, Kwangsup

    AU - Chen, Zhongming

    AU - Noda, Suguru

    AU - Fuller, Thomas F.

    AU - Jang, Hee Dong

    AU - Lee, Seung Woo

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