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Issue 38, 2011
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Supercapacitors based on self-assembled graphene organogel

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Self-assembled graphene organogel (SGO) with 3-dimensional (3D) macrostructure was prepared by solvothermal reduction of a graphene oxide (GO) dispersion in propylene carbonate (PC). This SGO was used as an electrode material for fabricating supercapacitors with a PC electrolyte. The supercapacitor can be operated in a wide voltage range of 0–3 V and exhibits a high specific capacitance of 140 F g−1 at a discharge current density of 1 A g−1. Furthermore, it can still keep a specific capacitance of 90 F g−1 at a high current density of 30 A g−1. The maximum energy density of the SGO based supercapacitor was tested to be 43.5 Wh kg−1, and this value is higher than those of the graphene based supercapacitors with aqueous or PC electrolytes reported previously. Furthermore, at a high discharge current density of 30 A g−1, the energy and power densities of the supercapacitor were measured to be 15.4 Wh kg−1 and 16 300 W kg−1, respectively. These results indicate that the supercapacitor has a high specific capacitance and power density, and excellent rate capability.

Graphical abstract: Supercapacitors based on self-assembled graphene organogel

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The article was received on 26 Jul 2011, accepted on 15 Aug 2011 and first published on 30 Aug 2011

Article type: Paper
DOI: 10.1039/C1CP22409C
Citation: Phys. Chem. Chem. Phys., 2011,13, 17249-17254

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    Supercapacitors based on self-assembled graphene organogel

    Y. Sun, Q. Wu and G. Shi, Phys. Chem. Chem. Phys., 2011, 13, 17249
    DOI: 10.1039/C1CP22409C

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