Plasma deposition technologies are applied as an alternative approach to conventionally used sintering techniques for the fabrication of the entire cell assembly of solid oxide fuel cells (SOFC). Based on advanced processes with both DC and RF plasma DLR Stuttgart has developed a concept of a planar SOFC with consecutive deposition of all layers of a thin-film cell onto a metallic substrate support. The current state of the development of this “spray concept” which focuses on the application of SOFC as auxiliary power units (APU) for electric power supply in vehicles and aircrafts is summarized in this paper.

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