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US 12,531,260 B2Granted
Bilayer ceramic interconnect
AssigneeUniversity of South Carolina
InventorsKevin Huang, Xin Yang
Life of this patent
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Abstract
Described herein are new solid oxide fuel cell interconnects and methods for making same that may comprise a novel bilayer construct on an anode substrate to provide a dense microstructure, low area specific resistance, and negligible oxygen permeability to form a bilayer ceramic interconnect that is a strong candidate for next-generation, durable, and low-cost tubular solid oxide fuel cells.
Claims7
A method for forming a fuel cell ceramic interconnect comprising:
- preparing at least one Sr1−xYxTi1−yNbyO3−δ powder via a solid state reaction via ball milling SrCO3, Y2O3, TiO2, and Nb2O5 in ethanol;
- ball milling the Sr1−xYxTi1−yNbyO3−δ powder, isopropanaol, polyvinyl butyral, triethannolamine and polyethylene glycol to form a slurry;
- dip-coating the slurry onto an external surface of a porous anode substrate followed by drying to form a Sr1−xYxTi1−yNbyO3−δ layer on the porous anode substrate;
- and
- dip-coating a La0.8Sr0.2MnO3 slurry onto the Sr1−xYxTi1−yNbyO3−δ layer on the porous anode substrate and drying to form a multilayer ceramic structure;
- and
- wherein an interconnect is formed by layering the La0.8Sr0.2MnO3 onto the Sr1−xYxTi1−yNbyO3−δ layer to provide the interconnect with a top layer of La0.8Sr0.2MnO3 over a bottom layer of Sr1−xYxTi1−yNbyO3−δ over the porous anode substrate.
4 more elements
Dependencies are inferred from the claim text.