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Issue 50, 2014
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High performance supercapacitor electrode material based on vertically aligned PANI grown on reduced graphene oxide/Ni(OH)2 hybrid composite

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Abstract

A simple and cost effective one pot hydrothermal process has been followed for the synthesis of flowery Ni(OH)2, reduced graphene oxide (rGO)/Ni(OH)2 hybrid composite. A ternary composite of rGO/Ni(OH)2/PANI has also been synthesised by in situ oxidative polymerisation of aniline with the binary composite of rGO/Ni(OH)2. A unique morphology of vertically aligned PANI on rGO surface and randomly connected PANI nanowires has been demonstrated following a heterogeneous nucleation on the rGO surface and homogeneous nucleation inside the bulk material. A comparative electrochemical analysis reveals a superior electrochemical behavior of the ternary composite over the rGO–Ni(OH)2, which again shows better electrochemical utility over the virgin Ni(OH)2. The proton insertion/deinsertion reversible pseudocapacitance of Ni(OH)2 combined with the pseudocapacitance of the vertically aligned conducting PANI nanowires and their synergistic effect with in situ reduced graphene oxide results in a high specific capacitance of 514 F g−1 at 2 A g−1 current density accompanied with 94.4% specific capacitance retention after 1000 charge discharge cycles at 5 A g−1 current density.

Graphical abstract: High performance supercapacitor electrode material based on vertically aligned PANI grown on reduced graphene oxide/Ni(OH)2 hybrid composite

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Publication details

The article was received on 26 Mar 2014, accepted on 27 May 2014 and first published on 02 Jun 2014


Article type: Paper
DOI: 10.1039/C4RA02653E
Citation: RSC Adv., 2014,4, 26094-26101
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    High performance supercapacitor electrode material based on vertically aligned PANI grown on reduced graphene oxide/Ni(OH)2 hybrid composite

    D. Ghosh, S. Giri, M. Mandal and C. K. Das, RSC Adv., 2014, 4, 26094
    DOI: 10.1039/C4RA02653E

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