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Electrochemical Porosimetry

Published online by Cambridge University Press:  17 March 2011

Hyun-Kon Song  and
Kun-Hong Lee
Hyun-Kon Song
Affiliation:
Department of Chemical Engineering / Electrical and Computer Engineering Division, Pohang University of Science and Technology, San 31, Hyoja-Dong, Nam-Ku, Pohang, Kyungbuk, 790-784, South Korea.
Kun-Hong Lee
Affiliation:
Department of Chemical Engineering / Electrical and Computer Engineering Division, Pohang University of Science and Technology, San 31, Hyoja-Dong, Nam-Ku, Pohang, Kyungbuk, 790-784, South Korea.
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Abstract

We have developed the electrochemical porosimetry analyzing microstructures of porous electrodes, which can give geometric information most meaningful in electrochemical systems. The methodology is based on the transmission line model with pore size distribution (TLM-PSD) that relates electrochemical impedance data with microstructural information. Pore length (lp), as well as pore size distribution, can be obtained by fitting the TLM-PSD to the experimental impedance data of a porous electrode. This geometric information was validated for the microporous, mesoporous and macroporous samples by comparing with the data obtained from conventional porosimetry. It was also shown that the electrochemical porosimetry could be used as a nondestructive probe to investigate the construction of electrochemical devices.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 699: Symposium R – Electrically Based Microstructural Characterization III , 2001 , R7.7
Copyright
Copyright © Materials Research Society 2002

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