e-journal

Effect of microwave-treatment time on the properties of activated carbons for electrochemical capacitors

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Abstract:
Activated carbons (ACs) made from petroleum coke by KOH activation were further treated by microwaves to investigate the effect of microwave-treatment time on the pore structure, the surface properties (functional groups) and the electrochemical properties of the as-made ACs for electrochemical capacitors (ECs). Results show that the specific capacitance and the equivalent series resistance of microwave-treated ACs become smaller with a decrease in the Brunauer-Emmett-Teller surface area and the total pore
volume (vt) of the treated ACs. Compared with the AC sample heated at 1073 K for 1 h by a conventional heating method, the AC sample treated by microwaves at 700 W for only 7 min has a pore size distribution with a high (meso- and macropore volume)/vt ratio and a high carbonyl content, and exhibits a high energy density and powder density as an electrode of ECs. This has clearly shown that the microwave-treatment is a simple and efficient approach to obtain high-performance ACs for ECs.
Key Words: Activated carbon; Microwave-treatment; Functional group; electrochemical capacitor; Energy density

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Ketersediaan

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Informasi Detail

Judul Seri

New Carbon Materials

No. Panggil

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Penerbit

China : Elsevier Limited., 2011

Deskripsi Fisik

New Carbon Materials, 2011, 26(4): 313–319.

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

Volume 26, Issue 4

Subjek

KIMIA KARBON

Info Detail Spesifik

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Pernyataan Tanggungjawab

yuli/agus

Versi lain/terkait

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