ELECTROLYTE MATERIALS FOR SOLID OXIDE ELECTROLYZER CELLS

A solid oxide electrolyzer electrolyte composition includes a scandia and ceria stabilized zirconia, containing 5 to 12 mol % scandia, 1 to 7 mol % ceria, and 80 to 94 mol % zirconia, or a yttria and ceria stabilized zirconia containing 3 to 10 mol % yttria, 1 to 6 mol % ceria, and 84 to 96 mol % zirconia.