Publications
Detailed Information
Electrochemical porosimetry: Deconvolution of distribution functions
Cited 6 time in
Web of Science
Cited 7 time in Scopus
- Authors
- Issue Date
- 2006-06-30
- Publisher
- Elsevier
- Citation
- Electrochem. Commun. 8 (2006) 1191
- Keywords
- Deconvolution ; Fourier transform ; Impedance ; Distribution function ; Low-pass filtering
- Abstract
- Discrete Fourier transform (DFT) was used to deconvolute the distribution of penetrability coefficient (αo-distribution, equivalent to pore size distribution) from electrochemical impedance data of porous electrodes. The working equation is the Fredholm integral equation of the first kind to correlate macroscopic impedance data to a theoretical model describing microscopic signal with the αo-distribution. Simulated and experimental impedance data were tested. Noise observed at high frequencies in Fourier space was removed before inversely Fourier-transforming the αo-distribution from Fourier space to real space. The accuracy of αo-distributions deconvoluted by DFT depended on the number, frequency range and quality of impedance data. The examples in this work showed that fairly accurate αo-distributions could be obtained by DFT deconvolution. Most promising method was to use the αo-distribution obtained from DFT deconvolution as the first guess to shape the true αo-distribution. Then, accurate αo-distributions could be obtained by estimating parameters of the pre-assumed distributions by using complex nonlinear least square fitting.
- ISSN
- 1388-2481
- Language
- English
- Files in This Item:
- There are no files associated with this item.
Item View & Download Count
Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.