|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Energy Conversion with Emphasis on SOFC
||Poisoning Mechanism and Performance Degradation at SOFC Cathode/Electrolyte Interfaces
||Teruhisa Horita, Masahiro Ishiyama, Katherine Develos-Bagarinao, Haruo Kishimoto, Katsuhiko Yamaji
|On-Site Speaker (Planned)
Poisoning is one of the critical issues to commercialize the durable and long-term stable SOFC systems. So far, Cr- and S- poisoning are the main impurities that affect the cathode performances. Especially at the (La,Sr)(Co,Fe)O3/CeO2/ZrO2 interfaces, a significant amount of SrCrO4 and SrSO4 are formed at the grain surfaces or triple phase boundaries which affects the reaction rates for oxygen reduction as well as O2- diffusion rates inside the (La,Sr)(Co,Fe)O3 due to loss of oxygen vacancies. Also, Sr diffusion through CeO2 and formation of SrZrO3 was observed at the CeO2/ZrO2. In this presentation, poisoning mechanisms are reviewed and related performance electrochemical degradation are discussed. The prospect for the life time estimation is also discussed.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)