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Kim, Guntae
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Research Interests
  • Solid Oxide Fuel Cells (SOFCs)& SOE, PEMFC, metal-air batteries, Metal-CO2 system, Catalyst for DRM

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Measurement of oxygen transport kinetics in epitaxial LaNiO4+delta thin films by electrical conductivity relaxation

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Title
Measurement of oxygen transport kinetics in epitaxial LaNiO4+delta thin films by electrical conductivity relaxation
Author
Kim, GuntaeWang, S.Jacobson, A. J.Chen, C. L.
Keywords
Electrical conductivity relaxation; La2NiO4+δ; Lanthanum nickel oxide; Oxygen exchange kinetics; Thin film
Issue Date
2006-07
Publisher
ELSEVIER SCIENCE BV
Citation
SOLID STATE IONICS, v.177, no.17-18, pp.1461 - 1467
Abstract
The oxygen transport kinetics of mixed ionic and electronic conducting La2NiO4 thin films made by pulsed laser deposition (PLD) were measured using the electrical conductivity relaxation (ECR) technique. Since the film thickness is ∼ 3000 A, the oxygen transport kinetics are controlled by the surface exchange rate. The experimental data are not well described by the usual single time constant model for oxygen surface exchange, but a good fit is obtained using two independent time constants. This model implies that the La2NiO4 film consists of two independent regions with different exchange rates that correspond to two different film microstructures.
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DOI
10.1016/j.ssi.2006.07.013
ISSN
0167-2738
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ECHE_Journal Papers
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