Comparison of atmospheric plasma sprayed anode layers for SOFCs using different feedstock
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Atmospheric plasma spraying (APS) is a cost-effective way to produce solid oxide fuel cell (SOFC) components. When using APS, therefore, sinter steps can be avoided, which is essential once a metallic support is used for the SOFC. Several properties are required regarding the microstructure of an optimized anode layer. Here, gas permeability, electrochemistry, electronic conductivity, coefficient of thermal expansion, as well as thermal shock resistance have to be considered. Different types of powder feedstock were investigated to develop an atmospheric plasma sprayed anode layer: (a) NiO or Ni together with YSZ as starting materials, (b) agglomerates in which NiO and YSZ are already mixed on a submicrometer range, (c) blended NiO/YSZ powder, and (d) separate injection of the individual NiO and YSZ powders, respectively, into the plasma by two separate powder lines. The performance of APS anodes are measured in single fuel-cell tests. Anode layers sprayed by a separate injection of the individual NiO and YSZ powders into the plasma show the best results.
Keywordscermet coatings fuel cells production/preparation technology
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- 5.P. Szabo, M. Lang, T. Franco, and G. Schiller, Fabrication and Development of Optimized Plasma-Sprayed SOFC Layers for Use in the DLR Spray Concept,Proc. Sixth European SOFC Forum (Lucerne/Switzerland), June 28 to July 2, 2004, M. Mogensen, Ed., European Fuel Cell Forum, 2004, p 259–267Google Scholar
- 7.H. Weckmann, O. Finkenwirth, R. Henne, and A. Refke, Microstructure of Ni-Graphite/YSZ Composite Coatings on Porous Metallic Substrates Obtained by Atmospheric Plasma Spraying (APS),Thermal Spray 2005: Advances in Technology and Application (Basel/Switzerland), May 2–4, 2005, E. Lugscheider, Ed., DVS, 2005, p 100–105Google Scholar
- 8.M. Lang, T. Franco, M. Johnson, G. Schiller, and P. Szabo, Characterization of Vacuum Plasma Sprayed Planar Solid Oxide Fuel Cells During Reduction-Oxidation Cycling,Proc. Sixth European SOFC Forum (Lucerne/Switzerland), June 28 to July 2, 2004, M. Mogensen, Ed., European Fuel Cell Forum, 2004, p 877–886Google Scholar
- 9.Crofer 22 APU, Material Data Sheet No. 8005, ThyssenKrupp VDM GmbHGoogle Scholar
- 10.R. Vaßen, D. Hathiramani, R.J. Damani, and D. Stöver, Gas-Tight Zirconia Electrolyte Layers for SOFCs by Atmospheric Plasma-Spraying,SOFC IX (Quebec City, Canada), May 15–20, 2005, S.C. Singhal and J. Mizusaki, Ed., The Electrochemical Society, 2005, p 1016–1024Google Scholar
- 12.H. Zoz and D. Ernst, Mechanical Alloying Using Cycle Operation—A New Way to Synthesize CMB-Materials,Fifth Int. Conf. on Advanced Particulate Materials and Processes (West Palm Beach, FL), April 7–9, 1997, F.H. Froes, Ed., 1997, p 103–111Google Scholar
- 13.D. Hathiramani, A. Mobeen, W. Fischer, P. Lersch, D. Sebold, R. Vaßen, D. Stöver, and R.J. Damani, Simultaneous Deposition of LSM and YSZ for SOFC Cathode Functional Layers by an APS Process,Thermal Spray 2005: Advances in Technology and Application (Basel/Switzerland), May 2–4, 2005, E. Lugscheider, Ed., DVS, 2005, p 585–589Google Scholar