Abstract
The ac small-signal response of La0.6Sr0.4CO02Feo.803 (LSCF) is examined via lumped parameter/complex plane analysis (LP/CPA) technique. The ac data, acquired in the frequency range lO-1≤F≤106Hz, are used to establish the role of ionic contribution in the LSCF material system using a two-terminal blocking electrode method. Spun-on yttria (8 mole percent (m/o) Y203) stabilized zirconia (8YSZ) or Ce0.85Sm0.15O2 (CSO) thin film coatings (0.3 - 1.0 µm) is used as electron blocking electrodes. The temperature dependence of the contributing elements between the terminals, obtained via LP/CPA technique and dc measurements, is evaluated. The activation energy, associated with possible oxygen transport via an anion vacancy mechanism, is found to be ~ 1.1 eV in the temperature range of 400-800°C. The effect of thickness and composition of the blocking electrodes are discussed. Finally, the advantages of the thin-film blocking electrodes compared to mechanical contact blocking electrodes are also presented. © 1995, The Electrochemical Society, Inc. All rights reserved.
Recommended Citation
C. C. Chen et al., "Immittance Response of La0.6Sr0.4CO0.2Fe0.8O3 based Electrochemical Cells," Journal of the Electrochemical Society, vol. 142, no. 2, pp. 491 - 496, The Electrochemical Society, Jan 1995.
The definitive version is available at https://doi.org/10.1149/1.2044082
Department(s)
Materials Science and Engineering
International Standard Serial Number (ISSN)
1945-7111; 0013-4651
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 The Electrochemical Society, All rights reserved.
Publication Date
01 Jan 1995
