Ionic polynorbornene crosslinked anion exchange membrane and preparation method therefor and use thereof
Through the method of direct polymerization of norbornene monomers and cross-linking with polythiol, the balance problem between covalent connection and chemical cross-linking in AEM is solved, and the preparation of cross-linked membranes with high conductivity and long-term stability is achieved. It is suitable for fuel cells, water electrolysis, electrodialysis and other fields, reducing production costs and supporting continuous production.
Patent Information
- Application Number
- PCT/CN2024/140741
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-03-14
- Filing Date
- 2024-12-19
- Publication Date
- 2025-09-18
AI Technical Summary
Existing technologies make it difficult to synthesize anion exchange membranes (AEMs) with high conductivity and long-term alkaline stability, as both covalently linked cationic functional groups and stable chemical cross-linking are required. Furthermore, existing methods suffer from high solvent consumption, long time, high cost, and are not conducive to continuous production.
By directly polymerizing norbornene monomers and subsequently cross-linking with polythiol, a cross-linked film is prepared using photo-initiation or thermal initiation methods. Chemical cross-linking is carried out using the active double bonds in the copolymer, and a chain transfer agent is combined to reduce the catalyst dosage, thereby achieving efficient and low-cost continuous production.
The prepared cross-linked membrane has excellent electrical conductivity, stability and mechanical properties, which solves the trade-off between electrical conductivity and stability. It is suitable for fuel cells, water electrolysis and electrodialysis, and realizes low-cost industrial production and application.