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Issue 35, 2014
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Synthesis of three-dimensional self-standing graphene/Ni(OH)2 composites for high-performance supercapacitors

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Abstract

Using surface active agents, three-dimensional (3D) self-standing graphene/Ni(OH)2 composites with different morphologies, such as nanoflowers, nanoslices and nanoparticles, are directly synthesized by a facile in situ electrodeposition method. SEM and Raman spectroscopy are used to investigate the morphologies and structures. Detailed electrochemical characterizations reveal that the 3D graphene/Ni(OH)2 nanoflower exhibits high specific capacitance (718.2 F gāˆ’1 at 6.7A gāˆ’1 in 6.0 M KOH aqueous solution) and good cycling performance (84.2% capacitance retention after 500 cycles) compared with those of other Ni(OH)2 morphologies. Nyquist plot investigation shows that 3D graphene/Ni(OH)2 nanoflowers present a low equivalent series resistance. These results indicate that the composite may be a promising candidate for high-performance supercapacitors.

Graphical abstract: Synthesis of three-dimensional self-standing graphene/Ni(OH)2 composites for high-performance supercapacitors

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Publication details

The article was received on 01 Feb 2014, accepted on 24 Mar 2014 and first published on 25 Mar 2014


Article type: Paper
DOI: 10.1039/C4RA00916A
Citation: RSC Adv., 2014,4, 18080-18085
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    Synthesis of three-dimensional self-standing graphene/Ni(OH)2 composites for high-performance supercapacitors

    C. Jiang, B. Zhan, C. Li, W. Huang and X. Dong, RSC Adv., 2014, 4, 18080
    DOI: 10.1039/C4RA00916A

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