| 摘要 |
PROBLEM TO BE SOLVED: To provide a differential pressure type water electrolysis apparatus which has a simple and economical constitution, in which damage of a solid polymer electrolyte membrane is restrained as much as possible and the power efficiency of which can be improved.SOLUTION: A unit cell 12 constituting the differential pressure type water electrolysis apparatus 10 includes an electrolyte membrane/electrode structure 32. The electrolyte membrane/electrode structure 32 is formed by placing an anode power feed body 40 and a cathode power feed body 42 respectively on both surfaces of the solid polymer electrolyte membrane 38. The solid polymer electrolyte membrane 38 has a first electrolyte layer 38a disposed on the cathode power feed body 42 side and a second electrolyte layer 38b disposed on the anode power feed body 40 side. The first electrolyte layer 38a comprises a hydrocarbon-based membrane. Meanwhile, the second electrolyte layer 38b comprises a fluorine-based membrane. |
