Two plasma spray techniques have been developed to produce membrane-type solid oxide fuel cell (SOFC) units with the advantages of consecutive integrated cell fabrication, high efficiency, good cost effectiveness and microstructure tailoring capability. The atmospheric plasma spray (APS) and solution precursor plasma spray (SPPS) processes have demonstrated their capabilities to produce dense electrolyte layers as well as porous electrode layers that are designed particularly for intermediate temperature SOFCs. With a universal plasma spray system, the integrated fabrication of a dense electrolyte, a porous cathode and a porous stabilized zirconia anode was produced using an optimal APS route. SPPS process has demonstrated more flexibility in materials, microstructures, porosities and overall thickness, and has been used successfully to produce a thin 40mol%-doped (LDC40) interlayer and a high-porosity anode layer, respectively. In this work we will present the deposition of a variety of electrolyte and electrode layers applied by air plasma spraying or solution precursor plasma spraying. The merits of the two techniques, microstructures of the electrolyte and electrode layers, and performances of the single SOFC units have been evaluated and summarized.
Issue Section:
Research Papers
Keywords:
plasma arc spraying,
solid oxide fuel cells,
cathodes,
electrochemical electrodes,
porosity,
electrolytes,
lanthanum compounds,
strontium compounds,
gallium compounds,
magnesium compounds,
manganese compounds,
cerium compounds,
nickel,
yttrium,
anodes,
Plasma Spray,
Solid Oxide Fuel Cell,
Intermediate Temperature,
LDC
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.Copyright © 2005
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