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Improving the utilization of ruthenium oxide within thick carbon–ruthenium oxide composites by annealing and anodizing for electrochemical supercapacitors

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Abstract
The effects of annealing in air and anodizing on the capacitive behavior of carbon–ruthenium (denoted as C–Ru) composites fabricated by wet impregnation were investigated in 0.1 M H2SO4 by cyclic voltammetry (CV) and chronopotentiometry (CP). The utilization of Ru species within the thick composites (-1000 lm) was greatly promoted by annealing in air at 240 -C for 8 h and anodizing in 0.1MH2SO4 at 1.2 V for 1.5 h, due to the formation of Ru oxide and the transformation into a hydrous nature and the maximal specific capacity of Ru oxide (760 F g-1 based on RuO2) could be obtained. The crystalline information of the composites with annealing at different temperatures was obtained from X-ray diffraction (XRD) patterns. The morphology of C–Ru composites was examined by scanning electron microscope (SEM). The specific surface area and pore-size distribution of the composites with annealing and/or anodizing were analyzed by the BET method.
Keywords: Wet impregnation; Carbon–ruthenium composite; Annealing; Anodizing; Electrochemical supercapacitor

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Informasi Detail

Judul Seri

Electrochemistry Communications

No. Panggil

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Penerbit

: Elsevier Science B.V. All rights reserved., 2002

Deskripsi Fisik

Electrochemistry Communications 4 (2002) 554–559

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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