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Issue 13, 2012
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Supercapacitors based on high-quality graphene scrolls

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Abstract

High-quality graphene scrolls (GSS) with a unique scrolled topography are designed using a microexplosion method. Their capacitance properties are investigated by cyclic voltammetry, galvanostatic charge–discharge and electrical impedance spectroscopy. Compared with the specific capacity of 110 F g−1 for graphene sheets, a remarkable capacity of 162.2 F g−1 is obtained at the current density of 1.0 A g−1 in 6 M KOH aqueous solution owing to the unique scrolled structure of GSS. The capacity value is increased by about 50% only because of the topological change of graphene sheets. Meanwhile, GSS exhibit excellent long-term cycling stability along with 96.8% retained after 1000 cycles at 1.0 A g−1. These encouraging results indicate that GSS based on the topological structure of graphene sheets are a kind of promising material for supercapacitors.

Graphical abstract: Supercapacitors based on high-quality graphene scrolls

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Publication details

The article was received on 31 Mar 2012, accepted on 09 May 2012 and first published on 11 May 2012


Article type: Paper
DOI: 10.1039/C2NR30779K
Nanoscale, 2012,4, 3997-4001

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    Supercapacitors based on high-quality graphene scrolls

    F. Zeng, Y. Kuang, G. Liu, R. Liu, Z. Huang, C. Fu and H. Zhou, Nanoscale, 2012, 4, 3997
    DOI: 10.1039/C2NR30779K

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