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In situ synthesis of cobalt doped polyaniline modified graphene composites for high performance supercapacitor electrode materials

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Abstract.
A new supercapacitor electrode material was prepared by the in situ oxidative polymerizat ion of aniline
in presence of graphene and transition metal. The structural property of the composites has been determined
by Raman spectroscopy. The formation of the comp osites has been confirmed by field emission
scanning electron microscopy and the high resolution transmission electron mic roscopy. The electrochemical
performance of the electrode materials has been illustrated by cyclic voltammetry, electrochemical
impedance spectroscopy and cyclic charge–discharge. The uniform structure together with
the observed high conductivities afforded high specific capacitance and good cycling stability during
the charge–discharge process when used as supercapacitor electrodes. A greater specific capacitance
has been achieved in the case of cobalt doped PANI on graphene (Gr/Co/PANI) composites in compariso n
with HCl doped PANI on graphene composites. The Gr/Co/PANI composites showed highest specific
capacitance of 989 F/g at a scan rate of 2 mV/s. The energy density of Gr/Co/PANI composites could reach
352 W h/kg at a power density of 1.581 kW/kg.

Keywords: Graphene, In situ synthesis, Cobalt doped polyaniline, Supercapacitor

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Informasi Detail

Judul Seri

Journal of Electroanalytical Chemistry

No. Panggil

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Penerbit

New York : Elsevier B.V.., 2013

Deskripsi Fisik

Journal of Electroanalytical Chemistry 697 (2013) 32–45

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA MATERIAL

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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