Chapter 31. Solid Oxide Fuel Cell Development at Forschungszentrum Juelich
- Edgar Lara-Curzio and
- Michael J. Readey
Published Online: 26 MAR 2008
Copyright © 2004 The American Ceramic Society
28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, Volume 25, Issue 3
How to Cite
Blum, L., Buchkremer, H.-P., Haart, L. G. J., Nabielek, H. and Willem, J. (2004) Solid Oxide Fuel Cell Development at Forschungszentrum Juelich, in 28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, Volume 25, Issue 3 (eds E. Lara-Curzio and M. J. Readey), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291184.ch31
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 2004
Print ISBN: 9780470051498
Online ISBN: 9780470291184
- electrical efficiency
Solid Oxide Fuel Cells (SOFCs) are a promising power generation technology due to their high electrical efficiency, multi-fuel capability, potential role in carbon sequestration and possibilities for coupling with a gas turbine. SOFC development is, however, fraught with various problems of high-temperature operations, cost-effective materials and manufacturing processes etc. To solve these problems, we have assembled and tested around 150 SOFC stacks in the last 8 years. Our present design consists of thin electrolyte, planar anode substrate cells in stacks with metallic interconnects featuring internal manifolding with counterflow.
The first in a series of large stacks was operated in 2002. All ferritic parts were made of commercial steel type X10CrAl 18 (Ferrotherm 4742). the 40-cell stack delivered 9.2 kWei in hydrogen operation and 5.4 kWei with methane as fuel. the average degradation rate of around 10% per 1 000h at 850°C is consistent with results published on characteristics of unprotected ferritic steel interconnects and our own laboratory experience.
A new series of short stacks was assembled with interconnects manufactured from the modified ferritic steel Crofer22 APU. the new series of stack tests was operated up to 4 000 hours with degradation rates between 2 and 3% per 1 000 hours of operation, a marked improvement over earlier stacks. However, the target of development is directed towards 0.75%/ 1000h for commercial operations.