Abstract
Solid electrolytes of cubic structure employed in Solid Oxide Fuel Cells (SOFC) like ceria (CeO 2) and zirconia (ZrO 2) are typically doped with a single selected element from the (Y, lanthanide)-series. Co-doping of ceria with several elements is investigated here in terms of its influence on ionic conductivity. It is found that, for a same total dopant concentration, mixtures of dopants give a higher total ionic conductivity (by 10–30%) than the best singly doped material.
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