Abstract
Rate capability is a limiting factor in solid oxide fuel cells (SOFCs), solid oxide electrolysis cells (SOECs), and oxide-based solid-state lithium (SSLiBs) and sodium (SSNaBs) batteries. In this presentation we will explain the roles of composition, structure, and interfaces in achieving extremely high current densities, and demonstrate SOFC/SOEC current densities of 5 mA/cm2 at 650°C, and SSNaB and SSLiB current densities of 30 mA/cm2 and 100 mA/cm2, respectively, at room temperature.
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