US 12,460,308 B2
Solid oxide electrolyzer cell including electrolysis-tolerant air-side electrode
Tad Armstrong, Burlingame, CA (US); and Justin Railsback, San Jose, CA (US)
Assigned to BLOOM ENERGY CORPORATION, San Jose, CA (US)
Filed by BLOOM ENERGY CORPORATION, San Jose, CA (US)
Filed on Nov. 5, 2021, as Appl. No. 17/519,996.
Prior Publication US 2023/0141938 A1, May 11, 2023
Int. Cl. C25B 13/07 (2021.01); C25B 1/04 (2021.01); C25B 9/19 (2021.01); C25B 9/65 (2021.01); C25B 9/70 (2021.01); C25B 13/02 (2006.01)
CPC C25B 13/07 (2021.01) [C25B 9/19 (2021.01); C25B 9/65 (2021.01); C25B 9/70 (2021.01); C25B 13/02 (2013.01); C25B 1/04 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A solid oxide electrolyzer cell (SOEC) comprising:
a solid oxide electrolyte;
a fuel-side electrode disposed on a fuel side of the electrolyte; and
an air-side electrode disposed on an air side of the electrolyte, the air-side electrode comprising:
a barrier layer disposed on the air side of the electrolyte and comprising a first samarium-doped ceria (SDC) material as a first doped ceria material;
a functional layer disposed on the barrier layer and comprising an electrically conductive material and a second doped ceria material comprising a second samarium-doped ceria (SDC) material wherein:
the electrically conductive material comprises lanthanum strontium cobalt ferrite (LSCF) represented by a formula (LaxSr1-x)yCozFe1-zO3-δ, wherein x ranges from 0.4 to 0.8, y ranges from 0.94 to 1.0, z ranges from 0.01 to 0.99, and δ is an equilibrium oxygen deficiency which ranges from 0 to 0.1; and
the second SDC material is represented by a formula Ce1-xSmxO2-d, wherein x ranges from 0.1 to 0.3, and d ranges from 0 to 0.2; and
an electrically-conductive perovskite current collector layer disposed on the air side of the functional layer opposite the barrier layer.