e-journal

Preparation of activated carbon aerogels with hierarchically porous structures for electrical double layer capacitors

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Abstract.
Activated carbon aerogels (ACAs) with hierarchically porous structures and high specific surface area have
been prepared via CO2 and KOH activation processes. The pore structures of ACAs are characterized by N2
adsorption/desorption and scanning electron microscopy. The experimental results show that the ACAs
contain three types of pores: micropores with diameters below 2 nm, small mesopores with diameters
from 2 to 4 nm and large pores or channels with diameters over 30 nm. The typical sample ACAs-4,
which possess pore volume of 2.73 cm3 g−1 and specific surface area of 2119 m2 g−1, exhibits high specific
capacitances of 250 F g−1 and 198 F g−1 at the current densities of 0.5 A g−1 and 20 A g−1 respectively in
6 M KOH aqueous solution. Furthermore, the resultant ACAs electrode materials also exhibit high power
density, good cycling stability and long lifetime. With these features, ACAs are expected to be promising
electrode materials for electrical double layer capacitors.

Keywords: Carbon aerogels; Hierarchically porous structure; Activation; Electrical double layer capacitors

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Ketersediaan

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Informasi Detail

Judul Seri

Electrochimica Acta

No. Panggil

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Penerbit

New York : Elsevier Ltd.., 2013

Deskripsi Fisik

Electrochimica Acta 89 (2013) 571– 576

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

89 (2013)

Subjek

KAPASITOR ELEKTROKIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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