Crosslinkable fluoropolymer compositions for sealing fuel cells

JP2025525509A5Pending Publication Date: 2026-06-15SOLVAY SPECIALTY POLYMERS ITALY SPA
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Patent Information

Application Number
JP2025501318
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-07-11
Filing Date
2023-07-07
Publication Date
2026-06-15

AI Technical Summary

Technical Problem

Existing sealing methods for fuel cell assemblies, particularly for bipolar plates and membranes in PEM fuel cell stacks, face challenges in achieving leak resistance and preventing ion leaching into water, which degrade fuel cell efficiency.

Method used

A water-based fluoroelastomer crosslinkable composition is applied as a seal between fuel cell components using traditional coating techniques, comprising vinylidene fluoride-based fluoropolymers and pyridinium salts, forming a resilient gasket that adheres to component surfaces and provides excellent leak resistance and reduced ion leaching.

Benefits of technology

The resulting fuel cell stack exhibits superior leak resistance and reduced ion leaching, enhancing fuel cell efficiency and durability.

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Abstract

The present invention relates to fuel cells incorporating sealing means, particularly for sealing bipolar plates to membranes in PEM fuel cell stacks, with the resulting fuel cell stacks exhibiting superior leak resistance and reduced ion leaching into water.
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