Electrochemical cell unit, electrochemical cell stack, method for producing electrochemical cell unit, and method for producing electrochemical cell stack

An electrochemical cell stack comprising:

• units each containing:
• a flat plate type membrane electrode assembly having a structure in which an electrolyte membrane, a first electrode layer disposed on a first surface of the electrolyte membrane, and a second electrode layer disposed on a second surface of the electrolyte membrane are laminated;
• a first current collector in contact with the first electrode layer of the membrane electrode assembly;
• an interconnector electrically connected to the first current collector,
• a second current collector in contact with the second electrode layer of the membrane electrode assembly;
• and
• an outer peripheral part made of a metal material that surrounds an outer periphery of the first electrode layer together with the interconnector and the electrolyte membrane to form a gas introduction space for guiding internal gas to the first electrode layer, and
• an attachment base part having a fixing part made of an electrically insulating member and fixes the units in which the second current collector of a first one of adjacent two of the units and the interconnector of a second one of the adjacent two of the units are electrically connected.