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Contribution à l'étude et à la mise en forme d'une cellule de pile à combustible à conduction protonique P.C.F.C.

Abstract : Hydrogen and fuel cells are now considered as a potential and credible alternative to the massive use of fossil fuels. In a French project led by EDF, a consortium focused its research on the achievement of a Proton Conducting Fuel Cell (P. C. F. C. ) operating at 600°C for residential use with BaCe0,9Y0,1O3-α as proton conductor. This study was led in this framework and aimed to understand the behaviour of this material during sintering and to assess tape casting and co-sintering as low cost process to shape anode-electrolyte half cells. BaCe0,9Y0,1O3-α can be easily prepared by soft chemistry. However, the refractory behaviour of this material imposes strong sintering parameters which led to its thermal decomposition and the degradation of its transport properties. We propose a model on this thermal damaging. The study of interactions between BaCe0,9Y0,1O3-α and NiO, generally used as nickel precursor in anode cermet, has been particularly complex, and highlighted both benefits (reduction of sintering temperature) and drawbacks (impaired transport properties) of Ni2+ diffusion. About shaping process, sedimentation of powders due to a lack of stability of slurries and interactions with NiO led to prohibitive deformations during co-sintering. As a consequence, a new metal supported approach based on the use of a nickel foam was developed, giving encouraging results.
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  • HAL Id : tel-03765841, version 1

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Rémi Costa. Contribution à l'étude et à la mise en forme d'une cellule de pile à combustible à conduction protonique P.C.F.C.. Sciences de l'ingénieur [physics]. école nationale supérieure des mines de Paris, 2009. Français. ⟨NNT : 2009ENMP0024⟩. ⟨tel-03765841⟩

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