Durability Assessment of SOFC Stacks with Several Types of Structures for Thermal Cycles during Their Lifetimes on Residential Use

New Energy and Industrial technology Development Organization (NEDO) in Japan started a project “Fundamental study on rapid evaluation method of SOFCs”. In the project, we try to develop a rapid evaluation method for durability of SOFC stacks with several types of structures for thermal cycles during their lifetimes based on the assumption of residential use. The durability of SOFC stacks for thermal cycles is expected to be affected by the degradation during their long-term operation. In order to accelerate the evaluation, a treatment to intentionally cause a rapid degradation is investigated. A degradation factor is determined depending on the SOFC stacks with different structures respectively because each degradation mechanism during their long-term operation also depends on them. Four types of SOFC stacks were selected for the assessment which have been developed by respective stack manufactures in Japan. In the presentation, we investigates the Cr-poisoning treatment for tubular SOFC manufactured by TOTO and the SO2-poisoning for co-fired type planer SOFC manufactured by Murata Manufacturing.