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Preparation of microporous activated carbon and its electrochemical Performance for electric double layer capacitor

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a b s t r a c t
Microporous activated carbons were prepared by microwave heating petroleum coke with potassium
hydroxide as activation agent.Microporous activated carbons were characterized by infrared spectro-
scopy, X-raydiffraction and nitrogen adsorption/desorption isotherms. Electrochemical properties of an
electric double layer capacitor using microporous activated carbonas electrode materials were
investigated by constant current charge-discharge and electrochemical impedance spectroscopic
techniques. The results show that the specific surface area and the pore volume of microporous
activated carbon increase with increasing activation time before the activation time reaches 37min. The
microporous volume totals 94.0%in the microporous activated carbons and the average pore diameter
of microporous activated carbonis 2.00nm. Microporous activated carbons prepared in the activation
time of 31,35 and 37 min are named as AC-31,AC-35 and AC-37,respectively. Compared with AC-27
electrode, the internal resistance for ions transferring in AC-31,AC-35orAC-37 electrode is relatively
small.The specific capacitance of AC-31 is the biggest among the microporous activated carbons,and it
retains 279.6Fg-1 maintaining 93.5% capacity after 200 recycling number.
Keywords: Infraredspectroscopy, X-raydiffraction, Electrochemicalproperties

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Informasi Detail

Judul Seri

Journal of Physics and Chemistry of Solids

No. Panggil

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Penerbit

: ElsevierLtd.., 2009

Deskripsi Fisik

Journal of Physics and Chemistry of Solids70(2009)738–744

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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