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Conducteurs mixtes nanostructurés pour les piles à combustible à oxyde solide (SOFC) : élaboration et performances de nouvelles architectures

Abstract : The reduction of the working temperature of solid oxide fuel cells, from around 1000°C to less that 700°C, is one of the best ways to decrease the fabrication costs and to increase significantly their lifetime. Nevertheless, lower operating temperature causes an increase in the electrode and electrolyte resistances; thus, the overall power output of the cell decreases. Our study is focused on the search of new materials and new architectures for SOFC. Half-cell of cathode/electrolyte with interfacial thin layers of YSZ, LSM and La2NiO4 were developed on YSZ dense substrates by different techniques (ALD, PVD and dip-coating). Several techniques were used to characterize the physico-chemical properties of these half-cells (scanning electron microscopy, X-ray diffraction); their electrical properties were studied by impedance spectroscopy. Another study was carried out on the ALD elaboration and the physico-chemical and electrical characterizations of thin layers of India-doped zirconia (IDZ) with a composition gradient, allowing to pass from an ionic conductor to an electronic one. The last part of this work was dedicated to a new GDC-carbonate electrolyte; the study of its electrical properties and ageing shows particularly promising results.
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https://pastel.archives-ouvertes.fr/pastel-00004896
Contributor : Ecole Chimie Paristech <>
Submitted on : Monday, March 30, 2009 - 8:00:00 AM
Last modification on : Monday, March 30, 2009 - 8:00:00 AM
Long-term archiving on: : Thursday, September 30, 2010 - 8:41:16 PM

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Messaoud Benamira. Conducteurs mixtes nanostructurés pour les piles à combustible à oxyde solide (SOFC) : élaboration et performances de nouvelles architectures. Chemical Sciences. Chimie ParisTech, 2008. English. ⟨pastel-00004896⟩

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