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Relationship between space charge and effective pore size of nanoporous electrode in electric double-layer capacitor

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Abstract.
The space-charge distributions of electric double-layer capacitors (EDLCs), which are energy storage
devices, were examined with the pulsed electroacoustic (PEA) method. It was found that the experimental
results could be influenced by the reflection and penetration of sound waves when the space-charge distributions of EDLCs were measured with the PEA method. This is because EDLCs have a five-layer structure
consisting of three materials (aluminum, cellulose, and activated carbon). We calculated the reflection
wave components that influenced the charge density through the acoustic impedance and the relative
permittivity of the materials. In this way, we found that the changes in the space-charge distributions of
EDLCs and their charge characteristics corresponded closely. We determined that measuring the spacecharge
distributions with the PEA method was effective for evaluating the charge accumulation of EDLCs.
In this study, a polarized electrode was prepared for use in EDLCs. The ratio of the surface area to the
average pore diameter of the polarized electrode was measured with the nitrogen adsorption method at
77 K. The relationship between the ratio of the surface area to the average pore size and the space-charge
distributions of EDLCs is also discussed in this paper.

Keywords: Electric double-layer capacitors; Pulsed electroacoustic method; Pore size

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Informasi Detail

Judul Seri

Particuology

No. Panggil

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Penerbit

New York : Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences., 2011

Deskripsi Fisik

Particuology 9 (2011) 91–94

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

9 (2011)

Subjek

KAPASITOR ELEKTROKIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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