Abstract: A polymer electrolyte fuel cell composed of a plurality of unit cells stacked one after another, which comprises: a water electrolysis portion and a fuel cell portion disposed in the single plane of each unit cell; an oxygen electrode disposed on one side of a proton exchange membrane and a hydrogen electrode disposed on the other side in the stacking direction of the unit cells; a diffusion layer disposed on both sides of each electrode for allowing generated electrons to pass through; interconnectors disposed outside the diffusion layers and having a gas passage for feeding the fuel cell portion with a gas; and a water passage disposed in the interconnector on the side of the oxygen electrode for feeding the water electrolysis portion with water. A fuel cell system and a production process of thereof are also disclosed.

Abstract: A solid polymer fuel cell which had a plurality of unit cells stacked one after another includes an electrode of an anion exchange membrane and an electrode of a cation exchange membrane disposed adjacent but not in contact with each other, gas diffusion layers commonly disposed on both sides of these electrodes for allowing electrons generated on the catalysts to pass, and interconnectors which are disposed outside the gas diffusion layers and serve as a current carrier having a gas channel.

Abstract: A polymer electrolyte fuel cell composed of a plurality of unit cells stacked one after another, which comprises: a water electrolysis portion and a fuel cell portion disposed in the single plane of each unit cell; an oxygen electrode disposed on one side of a proton exchange membrane and a hydrogen electrode disposed on the other side in the stacking direction of the unit cells; a diffusion layer disposed on both sides of each electrode for allowing generated electrons to pass through; interconnectors disposed outside the diffusion layers and having a gas passage for feeding the fuel cell portion with a gas; and a water passage disposed in the interconnector on the side of the oxygen electrode for feeding the water electrolysis portion with water. A fuel cell system and a production process of thereof are also disclosed.

Abstract: Disclosed is a solid polymer fuel cell system having a plurality of unit cells stacked one after another, wherein each of the unit cells is equipped with an electrode of an anion exchange membrane and an electrode of a cation exchange membrane which are adjacent but not in contact each other, gas diffusion layers commonly disposed on both sides of these membranes for allowing electrons generated at the catalyst to pass through, and an interconnector which is a current carrier having a gas passage and is disposed on the outside of the gas diffusion layer. The present invention makes it possible to save auxiliary equipment such as humidifier from a fuel cell system and owing to this reduction in the apparatus, to attain system simplification, cost reduction and space saving.