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Synergic Exfoliation of Graphene with Organic Molecules and Inorganic Ions for the Electrochemical Production of Flexible Electrodes

Authors

  • Dr. Zhen Yuan Xia,

    1. Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche via Gobetti 101, 40129 Bologna (Italy), Fax: (+39) 051-6399844
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  • Dr. Giuliano Giambastiani,

    1. Istituto di Chimica dei Composti OrganoMetallici, Consiglio Nazionale delle Ricerche via Madonna del Piano 10, 50019 Sesto Fiorentino (Italy)
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  • Christos Christodoulou,

    1. Humboldt-Universität zu Berlin, Institut für Physik, Brook-Taylor-Straße 6, 12489 Berlin (Germany)
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  • Marco V. Nardi,

    1. Humboldt-Universität zu Berlin, Institut für Physik, Brook-Taylor-Straße 6, 12489 Berlin (Germany)
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  • Prof. Norbert Koch,

    1. Humboldt-Universität zu Berlin, Institut für Physik, Brook-Taylor-Straße 6, 12489 Berlin (Germany)
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  • Dr. Emanuele Treossi,

    1. Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche via Gobetti 101, 40129 Bologna (Italy), Fax: (+39) 051-6399844
    2. Laboratorio MIST.E-R Bologna, via Gobetti 101, 40129 Bologna (Italy)
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  • Prof. Vittorio Bellani,

    1. Dipartimento di Fisica and CNISM, Universitá degli Studi di Pavia via Bassi 6, 27100 Pavia, Italy
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  • Sergio Pezzini,

    1. Dipartimento di Fisica and CNISM, Universitá degli Studi di Pavia via Bassi 6, 27100 Pavia, Italy
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  • Dr. Franco Corticelli,

    1. Istituto per la Microelettronica e Microsistemi, Consiglio Nazionale delle Ricerche via Gobetti 101, 40129 Bologna (Italy)
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  • Dr. Vittorio Morandi,

    1. Istituto per la Microelettronica e Microsistemi, Consiglio Nazionale delle Ricerche via Gobetti 101, 40129 Bologna (Italy)
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  • Dr. Alberto Zanelli,

    1. Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche via Gobetti 101, 40129 Bologna (Italy), Fax: (+39) 051-6399844
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  • Dr. Vincenzo Palermo

    Corresponding author
    1. Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche via Gobetti 101, 40129 Bologna (Italy), Fax: (+39) 051-6399844
    2. Laboratorio MIST.E-R Bologna, via Gobetti 101, 40129 Bologna (Italy)
    • Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche via Gobetti 101, 40129 Bologna (Italy), Fax: (+39) 051-6399844

    Search for more papers by this author

Abstract

A facile and efficient method based on electrochemistry for the production of graphene-based materials for electronics is demonstrated. Uncharged acetonitrile molecules are intercalated in graphite by electrochemical treatment, owing to the synergic action of perchlorate ions dissolved in acetonitrile. Then, acetonitrile molecules are decomposed with microwave irradiation, which causes gas production and rapid graphite exfoliation, with an increase in the graphite volume of up to 600 %. Upon further processing and purification, highly dispersible nanosheets are obtained that can be processed into thin layers by roll-to-roll transfer or into thicker electrodes with excellent capacitance stability upon extensive charging/discharging cycles. The good exfoliation yield (>50 % of monolayers), minimal oxidation damage and good electrochemical stability of the nanosheets obtained were confirmed by scanning force and electron microscopy, as well as Raman spectroscopy and galvanostatic analyses.

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