Factors governing oxygen reduction in solid oxide fuel cell cathodes

The recent interest in building a decentralized, hydrogen-based energy economy has refocused attention on the solid oxide fuel cell (SOFC) as potential source of efficient, environmentally friendly, fuel-versatile electric power. This review covers the advances made to date in the understanding of SOFC cathodes. Focus is on how new approaches have been used by workers to better understand cathode mechanisms and how these mechanisms relate to materials properties and microstructure.