Robust Advanced Materials for Metal Supported SOFC
The RAMSES project aims at developing an innovative high performance, robust, durable and cost-effective Solid Oxide Fuel Cell based on the Metal Supported Cell concept, i.e. the deposition of thin ceramic electrodes and electrolyte on a porous metallic substrate.
The objective is to develop a SOFC cell with an improved lifetime thanks to the low operating temperature (600°C) while achieving high performances by applying advanced low-temperature electrodes and electrolyte materials. The Metal Supported Cell concept (MSC) will in addition reduce statistically based mechanical failures, since this type of cell is intrinsically more mechanically robust, and decrease manufacturing cost by decreasing the amount of expensive ceramic materials to minimum. Cost reduction of Balance-of-Plant components will also be achieved because of the lower operating temperature (e.g. insulation, heat exchangers and recycle blowers).
Both planar and tubular cells will be developed. By considering advanced materials tailored for this cell design, such cells will be able to operate at 600°C on methane steam reforming, with an ASR of 0.8Ohm.cm² for planar cells and 1.0 Ohm.cm² for tubular cells and a degradation rate of 30 mOhm.cm²/khr. In addition, it will be able to withstand thermal/redox combined cycles. The achievement of such performance needs several key developments to be addressed: first the manufacturing of a durable metallic substrate; second the deposition of the ceramic layers without affecting the substrate microstructure, with a special emphasis on the dense electrolyte deposition. Finally the proof-of-concept will be demonstrated via the integration of the cells into a short stack, which is supported by inspection techniques to evaluate the good quality of components at each step of the process; and by testing activities to determine the performance and durability of cells and stacks, and to investigate specific identified failure mechanisms.