e-journal

Preparation of high-performance activated carbons for electric double layer capacitors by KOH activation of mesophase pitches

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Abstract
Two kinds of mesophase pitches with different softening points were prepared at different soaking times and directly acti-vated with KOH to study the effects of the softening point on the textural characteristics of the resulting activated carbons and their be-havior as electrodes in capacitors. Results show that the softening points of the two mesophase pitches are 280 and 330 °C, and the spe-cific surface areas of the activated carbons are 1 337 and 1 300 m2·g-1, respectively. The specific capacitance of the higher softening point mesophase pitch-derived carbon is higher (255.6 F·g-1) than that of the lower softening point mesophase pitch-derived carbon (190.8 F·g-1) at the same current density. Cyclic voltammograms show that the lower softening point mesophase pitch-derived carbon exhibits better rectangular-shaped I-V curves. The softening points of the mesophase pitches prepared from even the same precursor can significantly affect the electrochemical performance of the resulting activated carbons.
Key Words: Capacitors; Activated carbons; Mesophase pitch; Electrochemical properties

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Ketersediaan

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Informasi Detail

Judul Seri

New Carbon Materials

No. Panggil

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Penerbit

: Elsevier Limited. All rights reserved., 2008

Deskripsi Fisik

New Carbon Materials, 2010, 25(4): 285–290

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

Versi lain/terkait

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