DOPED SCANDIA STABILIZED ZIRCONIA ELECTROLYTE COMPOSITIONS

• US 20190312294A1
• Filed: 05/08/2019
• Published: 10/10/2019
• Est. Priority Date: 11/20/2012
• Status: Active Grant

• Current Assignee: Bloom Energy Corporation
• Original Assignee: Bloom Energy Corporation
• Inventors: Miller, David N., Savaniu, Cristian, Irvine, John TS, Armstrong, Tad
• Granted Patent: US 10,978,726 B2
• Time in Patent Office: Days
• CPC Class Codes: H01M 2008/1293 Fuel cells with solid oxide electrolytes
• CPC Class Codes: H01M 8/1253 the electrolyte containing zirconium oxide
• CPC Class Codes: Y02E 60/50 Fuel cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A solid oxide fuel cell (SOFC) electrolyte composition includes zirconia stabilized with scandia, and at least one of magnesia, zinc oxide, indium oxide, and gallium oxide, and optionally ceria in addition to the oxides above.

Claims

1. An electrolyte composition for a solid oxide fuel cell, comprising zirconia stabilized with scandia and magnesia.

2. The electrolyte composition of claim 1, wherein the electrolyte composition comprises a formula Zr_1-w-xSc_wMg_xO_d, wherein 0.12≤

w≤

0.20, wherein 0≤

x≤

0.05, and wherein 1.8≤

d≤

2.

3. The electrolyte composition of claim 2, wherein w=0.198−

x, and wherein d=1.90−

0.5x.

4. The electrolyte composition of claim 2, wherein w=0.198−

2x and d=1.9.

5. The electrolyte composition of claim 4, wherein x=0.0135.

6. The electrolyte composition of claim 5, wherein 0.14≤

w≤

0.16, and wherein d=1.95−

x.

7. The electrolyte composition of claim 6, wherein x=0.05, and wherein w=0.15.

8. The electrolyte composition of claim 1, wherein the electrolyte composition comprises a formula Zr_1-w-x-zSc_wMg_xIn_zO_d, wherein 0.1≤

w≤

0.18, wherein 0≤

x≤

0.03, wherein 0.01≤

z≤

0.12, and wherein 1.8≤

d≤

2.

9. The electrolyte composition of claim 8, wherein w=0.171−

z, wherein 0.013≤

x≤

0.014, and wherein 0.018≤

z≤

0.06.

10. The electrolyte composition of claim 8, wherein z=0.018 or z=0.036.