All-ceramic SOFC concept for cost-efficient µ CHPs: Long-term behaviour, degradation mechanisms, material and process optimisation

 

Within the hightech strategy of the German Federal Goverment, energy research is a top-priority task for the future. For a resource-saving use and handling of fossil fuels, combined heat and power (CHP) does represent a central technology in the stationary area. Thereby, the highest efficiency of approx. 90% is reached with SOFC-based systems [1]. For these, a growing market is predicted [1], which drives research for products with a higher durability, at a lower cost. Within KerSoLife100, an innovative,

promising all-ceramic SOFC cell design for cost-efficient µCHP is investigated by a consortium of partners of industry and science, which possesses a high potential to fulfil the market requirements with regard to durability and costs. In this concept, cost-effective materials, which so far have not been used for SOFC, are to be applied in combination with new process technologies. For this reason, there is a considerable risk that ageing phenomena, which so far have been unknown, do occur. These must be known to position such systems in the market successfully. This is why the investigation of degradation mechanisms and comprehension-oriented corrective measures on the levels of mounting technology and production technology as well as operating strategy is indispensable and of great scientific interest, from the economic point of view. This also includes the development of an approach for knowledge-based, accelerated testing to be able to evaluate the optimisation of the materials and the specific process technologies securely, and to guarantee the required durability.