Solid oxide electrolysis cell and cell assembly including the same

A cell assembly, comprising:

• a stack including a plurality of solid oxide electrolysis cells stacked on each other;
• and
• an electrical wire unit connecting the plurality of solid oxide electrolysis cells,
• wherein each solid oxide electrolysis cell includes:
• a unit including:
• a first unit cell including a first fuel electrode and a first air electrode opposite to each other, and a first electrolyte layer disposed between the first fuel electrode and the first air electrode and including a solid oxide;
• a second unit cell disposed to be spaced apart from the first unit cell, and including a second fuel electrode and a second air electrode opposite to each other, and a second electrolyte layer disposed between the second fuel electrode and the second air electrode;
• and
• a first porous conductive layer disposed between the first unit cell and the second unit cell;
• and
• a separator disposed outside of the unit and having a passage,
• wherein the second unit cell is disposed on the first unit cell, and a stacking order of the first fuel electrode, the first electrolyte layer, and the first air electrode of the first unit cell is mirror symmetrical to a stacking order of the second fuel electrode, the second electrolyte layer, and the second air electrode of the second unit cell in a stacking direction.

A cell assembly, comprising:

• a first unit cell including a first fuel electrode, a first air electrode, and a first electrolyte layer disposed between the first fuel electrode and the first air electrode and including a solid oxide;
• a second unit cell including a second fuel electrode, a second air electrode, and a second electrolyte layer disposed between the second fuel electrode and the second air electrode;
• a separator disposed between the first unit cell and the second unit cell and having a passage;
• a first porous conductive layer disposed below the first unit cell or on the second unit cell;
• and
• an electrical wire unit connected to the first unit cell, the second unit cell, and the first porous conductive layer,
• wherein a stacking order of the first fuel electrode, the first electrolyte layer, and the first air electrode of the first unit cell is mirror symmetrical to a stacking order of the second fuel electrode, the second electrolyte layer, and the second air electrode of the second unit cell in a stacking direction.