Analysis and Application of Distribution of Relaxation Times in Solid State Ionics

Boukamp, Bernard A.; Rolle, Aurelie

Document type :

Article dans une revue scientifique

DOI :

10.1016/j.ssi.2016.10.009

Permalink :

http://hdl.handle.net/20.500.12210/12772

Title :

Analysis and Application of Distribution of Relaxation Times in Solid State Ionics

Author(s) :

Boukamp, Bernard A. [Auteur]
Rolle, Aurelie [Auteur]

Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]

Journal title :

Solid State Ionics

Volume number :

302

Pages :

18-Dec

Publication date :

2017-04

HAL domain(s) :

Chimie/Chimie inorganique

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille

Collections :

Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

Matériaux inorganiques, structures, systèmes et propriétés (MISSP)

Submission date :

2019-09-25T14:06:45Z

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