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Unformatted text preview: r 5, 13 Remarks on Operating Temperature Current operating temperature 800-1000C Attempts to reduce the operating temperature - need to develop electrolyte material for lower temperature operation 600C operation demonstrated Advantages of high temperature operation - high quality waste heat precious metal catalyst not necessary CO as fuel slow startup thermal stress thermal expansion matching Disadvantages of high temperature operation Tuesday, November 5, 13 Anode and Cathode Materials Anode Cermet (ceramic + metal) made of metallic nickel and YSZ YSZ provides a thermal expansion coefficient comparable to electrolyte High porosity (20-40%) for mass transport (reactant and product) Cathode Strontium-doped lanthanum manganite (La0.84Sr0.16)MnO3 is most commonly used. Porous structure for mass transport Interconnect - Neighboring fuel cells are connected with "interconnect". In planar fuel cell this is bipolar plate, but for different arrangement, interconnects are necessary. Metals can be us...
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This document was uploaded on 11/20/2013.
- Fall '13