Preparation of Porosity-Graded SOFC Anode Substrates

P. Holtappels, C. Sorof, M.C. Verbraeken, S. Rambert, U. Vogt

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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.
Original languageUndefined
Pages (from-to)113-116
JournalFuel cells
Volume6
Issue number2
DOIs
Publication statusPublished - 2006

Keywords

  • Graded Porosity
  • Solid Oxide Fuel Cells
  • Substrates
  • IR-72180
  • Anodes

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