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Issue 19, 2015
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3D flower-structured graphene from CO2 for supercapacitors with ultrahigh areal capacitance at high current density

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Abstract

The widespread application of supercapacitors, which store electrical charge on high-surface-area conducting materials, is limited by their small accessible area and low areal mass loading of active materials due to their microporous structures. Herein, we report that 3D cauliflower-fungus-like graphene (CFG) with hierarchical mesoporous-structure and large fully accessible surface area, which was synthesized directly from CO2via the one-step exothermic approach, exhibited an ultrahigh areal capacitance up to 1.16 F cm−2 at a high current density up to 10 A g−1. The excellent performance remained almost unchanged with increasing temperature to 55 °C. Furthermore, the 3D CFG electrode can reach a high efficient-mass-loading of 11.16 mg cm−2, which meets the current commercial requirement (about 10 mg cm−2). This solves a critical issue that the enhancement of mass loading usually sacrifices the mass capacitance.

Graphical abstract: 3D flower-structured graphene from CO2 for supercapacitors with ultrahigh areal capacitance at high current density

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Publication details

The article was received on 08 Feb 2015, accepted on 13 Apr 2015 and first published on 13 Apr 2015


Article type: Communication
DOI: 10.1039/C5TA01055A
Citation: J. Mater. Chem. A, 2015,3, 10183-10187
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    3D flower-structured graphene from CO2 for supercapacitors with ultrahigh areal capacitance at high current density

    L. Chang, W. Wei, K. Sun and Y. H. Hu, J. Mater. Chem. A, 2015, 3, 10183
    DOI: 10.1039/C5TA01055A

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