Fuel cell and manufacturing method thereof

A manufacturing method of a fuel cell in which a plurality of single cells is laminated, the manufacturing method comprising:

• preparing a membrane electrode assembly;
• preparing a pair of gas separators each including
• a first manifold hole configured to form a first manifold through which reactant gas circulates, the first manifold penetrating the fuel cell in a laminating direction of the single cells, and
• a second manifold hole provided to be adjacent to the first manifold hole, the second manifold hole being configured to form a second manifold through which refrigerant circulates, the second manifold penetrating the fuel cell in the laminating direction of the single cells;
• providing a first gasket and a second gasket on a first surface of one of the gas separators, the first gasket being placed to surround an outer periphery of the first manifold hole, the second gasket being configured to seal a refrigerant passage including the second manifold and an inter-cell refrigerant passage through which the refrigerant flows between the single cells adjacent to each other;
• placing, between the gas separators, the membrane electrode assembly and a sealing member placed to be closer to an outer peripheral side of the single cells than the membrane electrode assembly so that a surface of the one of the gas separators, the surface being opposite to a surface on which the first gasket and the second gasket are provided, faces the membrane electrode assembly;
• and
• forming a sealing portion in a linear shape by bonding the sealing member to the gas separators by hot-press so that, when the fuel cell is viewed from the laminating direction, the first gasket, the sealing portion in which the sealing member is bonded to the gas separators, and the second gasket are placed in order of the first gasket, the sealing portion, and the second gasket from the first manifold toward the second manifold between the first manifold and the second manifold.