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.


Materials Science and Engineering

International Standard Serial Number (ISSN)

1945-7111; 0013-4651

Document Type

Article - Journal

Document Version


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© 2024 The Electrochemical Society, All rights reserved.

Publication Date

01 Jan 1995