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Ru oxide/carbon nanotube composites for supercapacitors prepared by spontaneous reduction of Ru(VI) and Ru(VII)

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a b s t r a c t
A novel method based on spontaneous reduction of Ru(VI) and Ru(VII) is reported for the deposition
of Ru oxide on multi-walled carbon nanotubes (MWCNT). Both purified and acid functionalized nanotubes
(p-MWCNT and a-MWCNT) have been used to produce composite materials for use in high power
aqueous supercapacitors. Specific capacitances of 213±16Fg−1 and 184±11Fg−1 were obtained for Ru
oxide/p-MWCNT and Ru oxide/a-MWCNT composites, respectively. Specific capacitances for the Ru oxide
component were 704±62Fg−1 and 803±72Fg−1, respectively. Current vs. potential curves exhibited
capacitance peaks at ca. +0.5V vs. Ag/AgCl. The Ru oxide/p-MWCNT composite was shown to be stable
over 20,000 charge/discharge cycles. An advantage of the method is that no pre-treatment of theMWCNT
is required for optimum performance.
Keywords: Carbon nanotubes, Ruthenium oxide, Supercapacitor, Impedance, Specific capacitance

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Informasi Detail

Judul Seri

Electrochimica Acta

No. Panggil

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Penerbit

: Elsevier Ltd. All rights reserved., 2009

Deskripsi Fisik

Electrochimica Acta 54 (2009) 7141–7147

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 KARBON

Info Detail Spesifik

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Pernyataan Tanggungjawab

yuli/agus

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