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Effect of carbon blacks filler addition on electrochemical behaviors of Co3O4/graphene nanosheets as a supercapacitor electrodes

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Abstract.
A series of cobalt oxide/graphene nanocomposites have been successfully synthesized by adding carbon
blacks filler. We have introduced carbon blacks to act as a structural modifier in fabricating graphene
based composites. The composites were prepared by ultrasonication and microwave-assisted methods.
Microstructure measurements showed that carbon blacks could be conductive links among layers of
graphene and cobalt oxide particles (5–7 nm in size), which was deposited on the edge surfaces of
nanosheets. This composite could function as a stable structured blocks for preventing an aggolomeration
of graphene layers. The electrochemical properties are investigated by cyclic voltammetry
(CV), galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS). The prepared
nanocomposites showed the superior capacitive performance with good rate capability, large specific
capacitance, and excellent cyclic performance. Among various samples, Co3O4/GNS–CB (15 wt.%) showed
the largest specific capacitance of 341 F g−1 at a scan rate of 10 mV s−1 in 6 M KOH electrolyte. Therefore,
the prepared composite could be potential electrode materials for supercapacitors.

Keywords: Graphene nanosheets, Cobalt oxide, Carbon blacks, Supercapacitor

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Informasi Detail

Judul Seri

Electrochimica Acta

No. Panggil

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Penerbit

New York : Elsevier Ltd.., 2012

Deskripsi Fisik

Electrochimica Acta 89 (2013) 516– 522

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

FISIKA MATERIAL

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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