Preparation of Porosity-Graded SOFC Anode Substrates

Holtappels, P. and Sorof, C. and Verbraeken, M.C. and Rambert, S. and Vogt, U. (2006) Preparation of Porosity-Graded SOFC Anode Substrates. Fuel Cells, 6 (2). pp. 113-116. ISSN 1615-6846

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Abstract:	Porosity graded anode substrates for solid oxide fuel cells are considered to optimise the gas transport through the substrate by maintaining a high electrochemical activity for fuel oxidation at the anode/solid electrolyte interface. In this work, the fabrication of porosity graded anode substrates, made from nickel oxide and yttria-modified zirconia and produced by dry uni-axial pressing, are described. Using carbon as pore formers and adjusting the particle size distribution in the ceramic NiO-YSZ masses, samples with gradually changing porosity are built up. The sintering behaviour of the individual layers is analysed and partly adjusted so the multi-layer support can be co-fired together with the YSZ electrolyte layer. In the oxidized state, four-layer, porosity graded anode supported half-cells with a dense YSZ electrolyte are demonstrated.
Item Type:	Article
Copyright:	© 2006 Wiley InterScience
Research Group:	Inorganic Materials Science (IMS)
Link to this item:	http://purl.utwente.nl/publications/72180
Official URL:	http://dx.doi.org/10.1002/fuce.200500116
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