e-journal

A reduced graphene oxide/Co3O4 composite for supercapacitor electrode

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Abstract.
20 nm sized Co3O4 nanoparticles are in-situ grown on the chemically reduced graphene oxide (rGO) sheets
to form a rGO-Co3O4 composite during hydrothermal processing. The rGO-Co3O4 composite is employed
as the pseudocapacitor electrode in the 2 M KOH aqueous electrolyte solution. The rGOeCo3O4 composite
electrode exhibits a specific capacitance of 472 F g
-1 at a scan rate of 2mV s
1 in a two-electrode cell. 82.6% of capacitance is retained when the scan rate increases to 100mV s-
1. The rGO-Co3O4 composite electrode
shows high rate capability and excellent long-term stability. It also exhibits high energy density at relatively high power density. The energy density reaches 39.0 Whkg-
1 at a power density of 8.3 kW kg
-1. The
super performance of the composite electrode is attributed to the synergistic effects of small size and good
redox activity of the Co3O4 particles combined with high electronic conductivity of the rGO sheets.

Keywords: Supercapacitor, Graphene, Co3O4, Composite, Energy storage

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Informasi Detail

Judul Seri

Journal of Power Sources

No. Panggil

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Penerbit

New York : Elsevier B.V.., 2013

Deskripsi Fisik

Journal of Power Sources 226 (2013) 65-70

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

Versi lain/terkait

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