Long term performance of stacks with chromium-based interconnects (CFY)

Chromium-based interconnects (CFY) in combination with electrolyte supported cells are perfectly matching the requirements of different SOFC applications. Furthermore, this type of stacks and the related manufacturing of cells and interconnects is already proven in very high volumes today. Plansee SE and Fraunhofer IKTS, together with partners in the SOFC20 project and lead customers, have developed the advanced MK351 stack-platform, which is now available for interested new customers. A suitable, well-adjusted combination of materials, especially regarding the cathode protection and contacting, has been developed. Sample test results have been verified in long term stack testing for more than 8,000 h. The stack has proven very low power degradation of less than 0.7 %/ 1,000 h.