Stacks, hot modules, and electrolytic devices

Abstract

The present invention provides a stack, hot module, and electrolytic device that can reduce the occurrence of fuel electrode delamination. [Solution] The stack comprises an electrolytic cell containing an electrolyte that isolates a fuel electrode and an air electrode in the thickness direction, a first current collector in contact with the fuel electrode, and a second current collector in contact with the air electrode. Multiple reaction units are connected in series in the thickness direction, and a fuel gas containing carbon dioxide flows along the portion where the fuel electrode and the first current collector are in contact. The stack comprises an intake-side manifold through which the fuel gas flows in the thickness direction, a first passage branching from the intake-side manifold to each reaction unit and connecting to a space containing a portion, an exhaust-side manifold through which the fuel gas that has flowed through the space flows in the thickness direction, and a second passage branching from the exhaust-side manifold to each reaction unit and connecting to a space, wherein at least one of the reaction units has a second passage with a cross-sectional area greater than the first passage.

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