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Article Dans Une Revue Journal of the European Ceramic Society Année : 2005

Modelling of a SOFC graded cathode

Résumé

One approach to improve the cathodic performances in a SOFC is to use a composite electrode which typically consists in a two phase porous mixture of a solid electrolyte (YSZ) and an electrocatalytic material (M). In our model, the cathode is composed of a mono-disperse porous mixture of YSZ and M spherical particles. From simulations by means of a statistical approach, the percolation rate is optimized for a compact particle stacking, a sufficient thick electrode, a volume fraction of YSZ equal to 0.5 and by grading the electrode composition for large porosity values. A one dimensional homogeneous model also predicts better cathodic performances by grading electrode composition and increasing ionic conductivity within the composite electrode.

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Domaines

Matériaux

Dates et versions

hal-00386438 , version 1 (21-05-2009)

Identifiants

Citer

Jonathan Deseure, Laurent Dessemond, Yann Bultel, Elisabeth Siebert. Modelling of a SOFC graded cathode. Journal of the European Ceramic Society, 2005, 25 (12), pp. 2673-2676. ⟨10.1016/j.jeurceramsoc.2005.03.121⟩. ⟨hal-00386438⟩
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