| CPC H01M 8/1253 (2013.01) [H01M 8/126 (2013.01)] | 16 Claims |

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1. A solid oxide electrolyzer electrolyte composition consisting essentially of a scandia and ceria stabilized zirconia, the composition consisting essentially of
5 to 12 mol % scandia;
2 to 7 mol % ceria; and
81 to 93 mol % zirconia.
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