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Efficient planar SOFC technology for a portable power generator

: Poenicke, A.; Reuber, S.; Dosch, C.; Megel, S.; Kusnezoff, M.; Wunderlich, C.; Michaelis, A.


Singh, P. ; American Ceramic Society -ACerS-, Westerville/Ohio:
Advances in Solid Oxide Fuel Cells VIII : A collection of 14 papers from The American Ceramic Society's 36th International Conference on Advanced Ceramics and Composites, held in Daytona Beach, Florida, January 22-27, 2012; includes papers presented in the 9th International Symposium on Solid Oxide Fuel Cells: Materials, Science, and Technology
Chichester: Wiley & Sons, 2012 (Ceramic engineering and science proceedings 33, 4)
ISBN: 978-1-118-20594-5
International Conference and Exposition on Advanced Ceramics and Composites (ICACC) <36, 2012, Daytona Beach/Fla.>
International Symposium on Solid Oxide Fuel Cells - Materials, Science, and Technology <9, 2012, Daytona Beach/Fla.>
Conference Paper
Fraunhofer IKTS ()
SOFC; stack; degradation; reliability; system; LPG

Portable power generators for camping and industrial applications require start-up times around 30 minutes and need to achieve a life time of 3,000 h including 300 cycles. Preferably they operate on available fuels and have a compact and lightweight system design. Eneramic®, a portable solid oxide fuel cell (SOFC) system in the 100 Watt class has been developed. A planar SOFC stack based on electrolyte supported cells and ferritic interconnects is used for the eneramic® system. The long-term stability of SOFC stacks was tested over more than 3,000 hours with power degradation below 1.0 %/1,000 h. However, hotbox testing of 40-cell stacks and stack operation in the system environment revealed slightly higher degradation rates between 2.1 and 2.3 %/1,000 hours. SOFC stacks exposed to thermal cycles showed no power losses. The results show that the compact planar SOFC stack is capable to survive the expected system life time.