Patent attributes
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.
