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 language | Undefined |
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Pages (from-to) | 113-116 |
Journal | Fuel cells |
Volume | 6 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2006 |
Keywords
- Graded Porosity
- Solid Oxide Fuel Cells
- Substrates
- IR-72180
- Anodes