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Issue 20, 2015
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Electrospray-deposition of graphene electrodes: a simple technique to build high-performance supercapacitors

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Abstract

Here we report an electrostatic spray deposition method to prepare three-dimensional porous graphene electrodes for supercapacitor applications. The symmetric supercapacitor exhibits excellent specific capacitance (366 F g−1 at 1 A g−1 in 6 M KOH) and long cycle life (108% capacitance retention up to 40 000 cycles). Moreover, the energy densities of the organic and aqueous electrolyte based supercapacitors reach 22.9 and 8.1 Wh kg−1 when the power densities are 119.2 and 15.4 kW kg−1, respectively. Compared with the previously reported graphene based supercapacitors, the improved properties could be attributed to the excellent three-dimensional open porous electrode structure, which is favorable for the ion diffusion and electron transport. In addition, this method provides a simple electrode-fabrication route without the involvement of conducting additives and binders. It may find vast applications in thin and miniaturized energy storage scenarios.

Graphical abstract: Electrospray-deposition of graphene electrodes: a simple technique to build high-performance supercapacitors

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Publication details

The article was received on 21 Jan 2015, accepted on 03 Apr 2015 and first published on 10 Apr 2015


Article type: Communication
DOI: 10.1039/C5NR00465A
Citation: Nanoscale, 2015,7, 9133-9139
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    Electrospray-deposition of graphene electrodes: a simple technique to build high-performance supercapacitors

    H. Tang, C. Yang, Z. Lin, Q. Yang, F. Kang and C. P. Wong, Nanoscale, 2015, 7, 9133
    DOI: 10.1039/C5NR00465A

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