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High-Temperature Radiative Behavior of an La2NiO4+δ Cathodic Layer for SOFCs (up to 900°C): Influence of δ and Texture

Ta, Minh Tri and Rousseau, Benoit and Del Campo, Leire and Rolland, Julien-Yves and Touchefeu, Stéphanie and Veron, Emmanuel and De Sousa Meneses, Domingos and Echegut, Patrick and Lenormand, Pascal and Ansart, Florence High-Temperature Radiative Behavior of an La2NiO4+δ Cathodic Layer for SOFCs (up to 900°C): Influence of δ and Texture. (2011) Journal of the American Ceramic Society, vol. 94 (n° 8). pp. 2535-2541. ISSN 0002-7820

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Official URL: http://dx.doi.org/10.1111/j.1551-2916.2011.04446.x

Abstract

Thermal radiation is likely to play an important role in the calculation of the energy balance in solid oxide fuel cells (SOFCs), due to their high operating temperatures (600°–1000°C). However, the majority of previous studies dealing with this issue have used room-temperature radiative data for determining the overall heat transfer process within a given cell, which could lead to an inexact appreciation of the role played by the thermal radiation. Consequently, the thermal field within the cell could also be incorrectly determined; however, accurate knowledge of the thermal field is important in order to understand the mechanical behavior of SOFCs. Several parameters, including chemical composition, texture, thickness, and of course operating temperature, have a large effect on the radiative properties of a given compound. As a first step to elucidate the temperature-dependent behavior of SOFCs, we deposited an La2NiO4+δ cathodic layer on a planar ZrO2–8% Y2O3 electrolyte-supported SOFC and investigated its radiative properties using high-temperature infrared emissivity spectroscopy (100°–900°C). Additional X-ray diffraction, thermo-gravimetric analysis, and environmental scanning electron microscopy measurements were also made to study the role played by both the chemical composition and texture on the radiative properties of the cell.

Item Type:Article
Additional Information:Diffusion on institutional repository is not pemitted by the editor.
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Université d'Orléans (FRANCE)
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Deposited By:Denis Faragou

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