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Resorcinol-formaldehyde based porous carbon as an electrode material for supercapacitors

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Abstract
Porous carbon materials were prepared using resorcinol and formaldehyde catalyzed by KOH in a sol–gel process followed by carbonization, during which the KOH serves as an activating agent and generates pores mainly located in the micropore range. With an increase of mass ratio of KOH to resorcinol from 1 to 4, both the specific surface area and the pore volume of the carbons increased, from 522 to 2760 m2/g and 0.304 to 1.347 cm3/g, respectively, but the average pore diameter decreased from 4.4 to 2.5 nm. Samples were investigated as electrode materials in supercapacitors and the relevant electrochemical behavior was characterized by cyclic voltammetry, electrochemical impedance spectroscopy and constant current charge–discharge experiments using 30% KOH aqueous solution as electrolyte. The highest specific capacitance of up to 294 F/g was obtained at a current density 1 mA/cm2 for the sample with mass ratio of KOH to resorcinol of 2. Only a slight decrease in capacitance for the same sample, from 294 to 242 F/g, was observed when the current density increased from 1 to 30 mA/cm2. The specific capacitance only decayed 3% at a current density 30 mA/cm2 after 1000 cycles, which indicates that the sample possesses excellent power property and cycle durability.

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Ketersediaan

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Informasi Detail

Judul Seri

Carbon

No. Panggil

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Penerbit

: Elsevier Ltd. All rights reserved.., 2006

Deskripsi Fisik

Carbon 45 (2007) 160–165

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

Lampiran Berkas

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