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Manufacturing of anode-supported tubular SOFCs by a new shaping technique using aqueous gel-casting
Navarro, M E; Capdevila, X. G.; Morales, Miguel; Roa Rovira, Joan Josep; Segarra, M.
Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
Anode-supported tubular SOFCs fabricated by using aqueous gel-casting. ► Manufacturing is one of the major focuses of SOFC cost reduction. ► Gel-casting is a method with a short shaping time, high yields and low-cost equipment ► A suitable relation of slurry viscosity, porosity and strength for tubular anodes was found.
A new gel-casting technique has been successfully developed to obtain tubular NiO–SDC anode-supported solid oxide fuel cells (SOFCs). Rheological parameters of the ceramic particle suspensions, directly influencing on casting and production, were investigated as a function of process parameters: solid loading, dispersant and agarose amounts. Afterwards, a SDC (Sm0.2Ce0.8O1.9) electrolyte film was deposited on NiO–SDC tubular anode substrates by colloidal spray-coating technique and co-sintering at 1400 °C for 5 h. The shrinkage and microstructure of the sintered cell components were studied. SEM results revealed high porosities of anode (40%) and cathode (La0.5Sr0.5CoO3, LSC), a dense SDC film electrolyte with a thickness of 30 μm and a good adhesion between the electrolyte, and the anode and cathode.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria dels materials
Fuel cells
Piles de combustible
Attribution-NonCommercial-NoDerivs 3.0 Spain

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