Abstract
Miniaturized solid-oxide fuel cells (micro-SOFCs) have received growing attention for use in portable devices. Conventional design of micro-SOFC has adopted a freestanding membrane supported by Si substate and used pure metal electrode which has shown poor thermomechanical-stability. In this study, we have developed a new design of micro-SOFC with porous stainless-steel (STS) as a substrate to support a thin-film membrane electrode assembly (MEA) to achieve thermally-robust cell. A composite of nano-porous (La,Sr)(Ti,Ni)O3 conductor and electrolyte is applied as a contact layer between the macro-porous STS and the thin-film MEA. Excellent electrochemical performance and thermal cycling ability at or below 550oC for this novel cell are demonstrated.
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