e-journal

Pore structure and electrochemical performances of tannin-based carbon cryogels

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Abstract.
Carbon cryogels have been obtained by freeze-drying and pyrolysis of a family of tannin formaldehyde organic gels prepared at different pHs. Such new materials, cheap and derived from biomass at a mass fraction of 0.8, were completely characterised in terms of pore structure and density. Samples obtained at pH higher than 6 were extremely lightweight and presented surface areas higher than 1200 m2 g
-1. Tested as electrodes for electric double-layer capacitors, specific capacitances as high as 100 F g
-1 were obtained and an ideal, purely capacitive, behaviour was always evidenced. Correlations have been observed between capacitance and micropore volumes, unambiguously suggesting that the latter mainly contribute to the capacitance.

Keywords: Carbon cryogel; Tannin; Pore structure; Supercapacitor; Cyclic voltammetry; Specific capacitance

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Ketersediaan

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Informasi Detail

Judul Seri

Biomass and Bioenergy

No. Panggil

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Penerbit

New York : Elsevier Ltd.., 2012

Deskripsi Fisik

Biomass and Bioenergy 39 (2012) 274 -282

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

39 (2012)

Subjek

KAPASITOR ELEKTROKIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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