Proton-conducting electrolytes for reversible solid oxide cells
View Patent ↗Disclosed herein are barium hafnate comprising proton-conducting electrolytes for use in solid oxide fuel cells. The disclosed electrolytes are also useful for electrolysis operations and for carbon dioxide tolerance.
1. A proton-conducting electrolyte having the formula:
BaHf x Ce 0.8−x Y 0.1 Yb 0.1 O 3−δ
wherein the index x is from about 0.1 to about 0.5.
2. The electrolyte according to claim 1 , chosen from BaHf 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3 , BaHf 0.2 Ce 0.6 Y 0.1 Yb 0.1 O 3 , BaHf 0.3 Ce 0.5 Y 0.1 Yb 0.1 O 3 , BaHf 0.4 Ce 0.4 Y 0.1 Yb 0.1 O 3 , or BaHf 0.5 Ce 0.3 Y 0.1 Yb 0.1 O 3 .
3. A solid state fuel cell comprising a barium hafnium proton-conducting electrolyte having the formula:
BaHf x Ce 0.8−x Y 0.1 Yb 0.1 O 3−δ
wherein the index x is from about 0.1 to about 0.5.
4. The electrolyte according to claim 3 , chosen from BaHf 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3 , BaHf 0.2 Ce 0.6 Y 0.1 Yb 0.1 O 3 , BaHf 0.3 Ce 0.5 Y 0.1 Yb 0.1 O 3 , BaHf 0.4 Ce 0.4 Y 0.1 Yb 0.1 O 3 , or BaHf 0.5 Ce 0.3 Y 0.1 Yb 0.1 O 3 .