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  • On-silicon supercapacitors with enhanced storage performance

    Author(s)
    Ahmed, Mohsin
    Wang, Bei
    Gupta, Bharati
    Boeckl, John J
    Motta, Nunzio
    Iacopi, Francesca
    Griffith University Author(s)
    Iacopi, Francesca
    Ahmed, Mohsin
    Wang, Bei
    Year published
    2017
    Metadata
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    Abstract
    The expanding development of portable electronic devices and ubiquitous sensing systems has created a strong demand for efficient miniaturized energy storage units, with planar geometries and capable of being integrated on a silicon platform. Generally, the performance of thin-film storage devices, including using graphene, is dramatically limited by their low surface area for ion-exchange. We had recently shown that a higher number of graphene layers does not translate into higher storage performance. Here we show a way to overcome this limitation and achieve a maximum accessible area for ion exchange. A repeated graphitization ...
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    The expanding development of portable electronic devices and ubiquitous sensing systems has created a strong demand for efficient miniaturized energy storage units, with planar geometries and capable of being integrated on a silicon platform. Generally, the performance of thin-film storage devices, including using graphene, is dramatically limited by their low surface area for ion-exchange. We had recently shown that a higher number of graphene layers does not translate into higher storage performance. Here we show a way to overcome this limitation and achieve a maximum accessible area for ion exchange. A repeated graphitization strategy using a nickel catalyst on epitaxial silicon carbide films on silicon yields few-layers graphenic nanocarbon electrodes with prominent edge defects, facilitating the intercalation between multiple graphenic sheets while maintaining overall a high electrode conductivity.
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    Journal Title
    Journal of the Electrochemical Society
    Volume
    164
    Issue
    4
    DOI
    https://doi.org/10.1149/2.0671704jes
    Subject
    Macromolecular and materials chemistry
    Physical chemistry
    Electrochemistry
    Materials engineering
    Publication URI
    http://hdl.handle.net/10072/352388
    Collection
    • Journal articles

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