Solid-oxide cell, cell stack device and module, and module housing device

A solid-oxide cell, comprising:

• a porous substrate comprising
• a first main surface,
• a second main surface opposite the first main surface,
• a first side surface,
• a second side surface opposite the first side surface, the first side surface and the second side surface connecting the first main surface to the second main surface, and
• at least one gas-flow passage extending in a longitudinal direction through the porous substrate from a first end of the porous substrate to a second end of the porous substrate to form a tunnel, wherein the at least one gas-flow passage defines a first opening in the first end of the porous substrate and a second opening in the second end of the porous substrate, and wherein the porous substrate is flat in a cross-section along the longitudinal direction;
• and
• a solid electrolyte layer provided on the first main surface, the first side surface, and the second side surface;
• and
• a second electrode layer provided on the solid electrolyte layer;
• wherein, along the longitudinal direction and which passes through a center of the porous substrate, a thickness between the first main surface and the second main surface at both the first end and the second end of the porous substrate is greater than a thickness between the first main surface and the second main surface at the center of the porous substrate.

A solid-oxide cell, comprising:

• a porous substrate comprising
• a first main surface,
• a second main surface opposite the first main surface,
• a first side surface,
• a second side surface opposite the first side surface, the first side surface and the second side surface connecting the first main surface to the second main surface, and
• at least one gas-flow passage extending in a longitudinal direction through the porous substrate from a first end of the porous substrate to a second end of the porous substrate to form a tunnel, wherein the at least one gas-flow passage defines a first opening in the first end of the porous substrate and a second opening in the second end of the porous substrate, and wherein the porous substrate is flat in a cross-section along the longitudinal direction;
• and
• an element part provided on the first main surface of the porous substrate and comprising
• a first electrode layer,
• a solid electrolyte layer, and
• a second electrode layer;
• wherein, along the longitudinal direction and which passes through a center of the porous substrate, a width between the first side surface and the second side surface at both the first end and the second end of the porous substrate is greater than a width between the first side surface and the second side surface at the center of the porous substrate.