Analysis and Application of Distribution ...
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
Analysis and Application of Distribution of Relaxation Times in Solid State Ionics
Auteur(s) :
Boukamp, Bernard A. [Auteur]
Rolle, Aurelie [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Rolle, Aurelie [Auteur]

Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Titre de la revue :
Solid State Ionics
Numéro :
302
Pagination :
18-Dec
Date de publication :
2017-04
Discipline(s) HAL :
Chimie/Chimie inorganique
Résumé en anglais : [en]
Three methods for obtaining a Distribution (Function) of Relaxation Times (DFRT) are compared, Fourier transform (FT), Tikhonov regularization (TR) and a multiple-(RQ) CNLS-fit. The FT method was written in the programming ...
Lire la suite >Three methods for obtaining a Distribution (Function) of Relaxation Times (DFRT) are compared, Fourier transform (FT), Tikhonov regularization (TR) and a multiple-(RQ) CNLS-fit. The FT method was written in the programming package ‘Borland Delphi’, for the Tikhonov regularization (TR) a freely available MatLab application (DRTtools) was used. The CNLS-fit was performed with the EqCwin95 software. Where possible the DFRT's were compared with an exact, calculated τ-domain representation of the model impedance. Practical use of the DFRT is demonstrated in the analysis of the impedance of a Ca3Co4O9 + δ-Ce0.9Gd0.1O0.95 composite cathode (CCO-CGO). The comparison shows that the FT and TR methods have problems in presenting the sharp and asymmetric peak of the DFRT of a Gerischer dispersion. In that case the multiple-(RQ) CNLS-fit presents too many peaks. Reconstruction of the impedance from the DFRT and comparing it to the original data set is a useful validation procedure for the DFRT.Lire moins >
Lire la suite >Three methods for obtaining a Distribution (Function) of Relaxation Times (DFRT) are compared, Fourier transform (FT), Tikhonov regularization (TR) and a multiple-(RQ) CNLS-fit. The FT method was written in the programming package ‘Borland Delphi’, for the Tikhonov regularization (TR) a freely available MatLab application (DRTtools) was used. The CNLS-fit was performed with the EqCwin95 software. Where possible the DFRT's were compared with an exact, calculated τ-domain representation of the model impedance. Practical use of the DFRT is demonstrated in the analysis of the impedance of a Ca3Co4O9 + δ-Ce0.9Gd0.1O0.95 composite cathode (CCO-CGO). The comparison shows that the FT and TR methods have problems in presenting the sharp and asymmetric peak of the DFRT of a Gerischer dispersion. In that case the multiple-(RQ) CNLS-fit presents too many peaks. Reconstruction of the impedance from the DFRT and comparing it to the original data set is a useful validation procedure for the DFRT.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
Matériaux inorganiques, structures, systèmes et propriétés (MISSP)
Date de dépôt :
2019-09-25T14:06:45Z