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US 7,351,488 B2Granted
Structures and fabrication techniques for solid state electrochemical devices
AssigneeThe Regents of the University of California
InventorsSteven J. Visco, Craig P. Jacobson, Lutgard C. DeJonghe
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Abstract
Porous substrates and associated structures for solid-state electrochemical devices, such as solid-oxide fuel cells (SOFCs), are low-cost, mechanically strong and highly electronically conductive. Some preferred structures have a thin layer of an electrocatalytically active material (e.g., Ni—YSZ) coating a porous high-strength alloy support (e.g., SS-430) to form a porous SOFC fuel electrode. Electrode/electrolyte structures can be formed by co-firing or constrained sintering processes.
Claims39
A solid oxide fuel cell, comprising:
- a sintered substrate consisting essentially of a material selected from the group consisting of a porous non-noble transition metal, a porous non-noble transition metal alloy, and a porous cermet incorporating one or more of a non-noble, non-nickel transition metal and a non-noble transition metal alloy;
- a first porous electrode material having high electrocatalytic activity on the substrate;
- an electrolyte comprising a dense, sintered coating of a ceramic material on the electrode;
- and
- a second porous electrode on the electrolyte.
2 more elements
Dependencies are inferred from the claim text.