Ion exchange resin, electrode forming composition, electrode, anode for water electrolysis apparatus, membrane electrode assembly, and water electrolysis apparatus

The ion exchange resin with a specific block copolymer structure addresses the issue of high-temperature sintering in electrode manufacturing, enabling electrodes with improved ion conductivity and mechanical strength for efficient water electrolysis.

JP2026096722APending Publication Date: 2026-06-15TOKUYAMA CORP
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Patent Information

Application Number
JP2024210524
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-12-03
Publication Date
2026-06-15

AI Technical Summary

Technical Problem

Existing electrode manufacturing processes for water electrolysis require high-temperature sintering and result in electrodes with catalyst layers that are soluble in electrolytes, leading to decreased performance and efficiency.

Method used

The use of an ion exchange resin with a styrene-ethylene-butylene-styrene block copolymer structure and an ion exchange capacity of 0.30 meq./g to 0.80 meq./g, which functions as a binder and allows for sintering at lower temperatures, creating electrodes with improved ion conductivity and mechanical strength.

Benefits of technology

This approach eliminates the need for high-temperature sintering, resulting in electrodes with a catalyst layer that is poorly soluble in electrolytes and purified water, enhancing the efficiency and performance of water electrolysis apparatus.

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Abstract

The present invention provides an ion exchange resin that enables the realization of highly durable electrodes, an electrode-forming composition containing this ion exchange resin, an electrode, an anode for a water electrolysis apparatus, a membrane electrode assembly, and a water electrolysis apparatus. [Solution] According to one aspect, an ion exchange resin is provided. The ion exchange resin has an ion exchange capacity of 0.30 meq. / g or more and 0.80 meq. / g or less. The ion exchange resin has a block copolymer structure of styrene-ethylene-butylene-styrene. According to one aspect, an electrode-forming composition is provided. The electrode-forming composition comprises the ion exchange resin, catalyst, and solvent according to the other aspect.
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