JP2008010350A5 - - Google Patents

Claims (4)

A membrane / electrode assembly main body comprising a polymer electrolyte membrane and electrode layers respectively provided on both surfaces of the electrolyte membrane; and a peripheral edge of the membrane / electrode assembly main body and sandwiching the outer edge of the polymer electrolyte membrane A membrane electrode assembly comprising a plate-like frame body formed so as to surround;
An anode separator and a cathode separator which have a flow path forming groove which covers the electrode layer of the membrane electrode assembly main body and sandwiches both surfaces of the membrane electrode assembly main body and defines a fluid flow path in contact with the electrode layer And a gas supply communication passage that extends inside the frame in the surface direction and communicates the manifold hole and the fluid flow path,
The frame body is provided with a recessed portion at an inner peripheral edge, and includes a pair of manifold holes for each of the oxidant gas and the fuel gas around the recessed portion, and the frame bodies are in surface contact with each other in a pressed state, and the manifold The hole is isolated from the outside in an airtight manner, and the anode separator and the cathode separator are in surface contact with each other so that the anode separator, the cathode separator, and the frame are pressed to isolate the fluid flow path from the outside. A unit cell for a polymer electrolyte fuel cell, comprising: The frame further includes a separator gasket provided in the recess, and a gas gasket for a manifold folder hole provided around the manifold folder hole,
Under the compression of the plurality of unit cells, the gas gasket and the separator gasket provided in the frame body are deformed in the stacking direction, and the manifold hole and the fluid flow path are hermetically isolated from the outside. The unit cell for a polymer electrolyte fuel cell according to claim 1.   A polymer electrolyte fuel comprising: stacking the unit cells according to claim 1 or 2; providing metal current collector plates at both ends of the stacked unit cells; and fixing the current collector plates. battery. A membrane electrode assembly having an electrode layer on each of both surfaces of the polymer electrolyte membrane and the electrolyte membrane, a frame body arranged to surround an outer edge of the membrane electrode assembly, and a gas flow channel groove are formed respectively. A unit cell is composed of an anode separator and a cathode separator arranged so as to cover the electrode layer and sandwich the membrane electrode assembly,
A plurality of gas supply passages that are formed inside the frame body and extend in the surface direction of the frame body and communicate with manifold holes formed in the frame body and gas flow channel grooves formed in the separator. A communication passage, and both the anode separator and the cathode separator are disposed inside the manifold hole;
A polymer electrolyte fuel cell, wherein the unit cells are stacked, metal current collector plates are provided at both ends of the stacked unit cells, and the current collector plates are fixed.