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.