Design for solid oxide fuel cell stacks

A solid oxide fuel cell stack, comprising:

• a plurality of solid oxide fuel cells juxtaposed to one another, with at least two of said cells having a substantially flat configuration;
• each of said two cells comprising an anode layer, an electrolyte layer, and a cathode layer;
• and
• at least one interconnect disposed among said plurality of cells, said interconnect being capable of providing an electrical connection between said cells, and said interconnect comprising a plurality of first extensions on a first surface of said interconnect and a plurality of second depressions on a second surface of said interconnect, said first extensions comprised of said second depressions and said second depressions comprised of said first extensions such that said first extensions and second depressions comprise one another and integrally form with one another a plurality of oxidant passageways and fuel passageways that form and define one another, thereby reducing the thickness by about one-half and whereby a fuel and an oxidant flow in a crossflow pattern, coflow pattern, counterflow pattern, and radial pattern through said stack in the absence of changing a configuration of said interconnects.