Performance and Reliability Improvement of Planar SOFC Stack with Advanced Design of Unit Cell and Sealing

Commercialization of SOFC technology requires the development of high performance SOFC stack, combined with an engineering focus on stack reliability and cost. Recently KIST was successful to greatly improve the performance and reliability of SOFC stack based on newly developed 10x10 cm2 anode- supported cells and glass-based compression-seal gaskets. In this study, a novel design of SOFC unit cells with higher thermo-mechanical stability and better electrochemical performance has been introduced and its evaluation results are discussed in terms of its electrical property, structural property and unit cell performance. We also address the key factors and the latest progress in sealing technique in a view point of sealing capability and thermal-cycle stability.