High-pressure water electolysis apparatus

摘要

A high-pressure water electrolysis apparatus includes a solid polymer electrolyte membrane, an anode side separator, a cathode side separator, an anode side element member, a cathode side element member, a high-pressure hydrogen communication hole, a first seal member, and a second seal member. The first seal member is provided between the solid polymer electrolyte membrane and an outer circumference edge portion of the anode side separator. The second seal member has a thickness same as a thickness of the anode side element member at a time of operation of the high-pressure water electrolysis apparatus. The second seal member is disposed in an anode chamber to shield between the anode chamber and the high-pressure hydrogen communication hole.

主权项

1. A high-pressure water electrolysis apparatus comprising:
a solid polymer electrolyte membrane; an anode side separator disposed on a first face side of the solid polymer electrolyte membrane and including an outer circumference edge portion facing the solid polymer electrolyte membrane to define an anode chamber opened to the first face side; a cathode side separator disposed on a second face side of the solid polymer electrolyte membrane and including a cathode chamber opened to the second face side; an anode side element member comprising:
an anode current collector; anda water channel member to distribute electrolytic water to the anode current collector, the water channel member being disposed in the anode chamber and including an outer circumference edge portion facing the solid polymer electrolyte membrane; a cathode side element member disposed in the cathode chamber and comprising:
a cathode current collector; anda pressing member to press the cathode current collector against a side of the solid polymer electrolyte membrane; a high-pressure hydrogen communication hole which extends through the anode current collector, the solid polymer electrolyte membrane, and the cathode current collector and through which high-pressure hydrogen generated from the electrolytic water by electrolyzation is to be discharged; a first seal member provided between the solid polymer electrolyte membrane and the outer circumference edge portion of the anode side separator, one of the outer circumference edge portion of the anode side separator and the outer circumference edge portion of the water channel member having a smaller dimension at depth from a bottom of the anode chamber than a thickness of the anode side element member; and a second seal member having a thickness same as the thickness of the anode side element member at a time of operation of the high-pressure water electrolysis apparatus, the second seal member being disposed in the anode chamber to shield between the anode chamber and the high-pressure hydrogen communication hole.