Solid polymer electrolyte membrane, alkaline water electrolysis apparatus, and production method of solid polymer electrolyte membrane
A fluorine-containing polymer and non-woven fabric combination in the solid polymer electrolyte membrane addresses strength and gas mixing issues, achieving low voltage and safe gas separation in alkaline water electrolysis.
JP2025113903APending Publication Date: 2025-08-04ASAHI KASEI KOGYO KABUSHIKI KAISHA
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Patent Information
- Application Number
- JP2024008302
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-01-23
- Publication Date
- 2025-08-04
AI Technical Summary
Technical Problem
Existing alkaline water electrolysis diaphragms lack sufficient strength in all directions, leading to potential mixing of oxygen and hydrogen gases, which can enter explosive concentrations.
Method used
A solid polymer electrolyte membrane composed of a fluorine-containing polymer with an ion exchange group and a non-woven fabric, optimized by controlling the weight and hydrogen permeability, provides enhanced strength and gas barrier properties.
Benefits of technology
The membrane maintains low electrolysis voltage even at high current densities while effectively preventing gas mixing, ensuring safety and efficiency in alkaline water electrolysis devices.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide: a solid polymer electrolyte membrane for alkaline water electrolysis excellent in omnidirectional large pressure resistance generated on a diaphragm partitioning an anode chamber and a cathode chamber of a water electrolysis apparatus and having a gas blocking property stably suppressing mixing of an oxygen gas and a hydrogen gas; and an alkaline water electrolysis apparatus.SOLUTION: There is provided a solid polymer electrolyte membrane which contains a nonwoven fabric comprising a fluorine-containing polymer having an ion exchange group and a polymer having a hydrogen permeability coefficient within a predetermined range, in which the weight of the fluorine-containing polymer per unit area of the solid polymer electrolyte membrane is within a predetermined range.SELECTED DRAWING: Figure 1
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