Azulene-based polysulfone anion exchange membrane, preparation method and application thereof

Anion exchange membranes were prepared by using azulene polysulfone polymers. By utilizing the strong dipole moment azulene groups and branched structure, the problems of low OH- conductivity and insufficient alkaline stability of anion exchange membranes were solved, thus realizing high-performance membrane materials for alkaline fuel cells and electrolyzers.

CN119735810BActive Publication Date: 2025-11-25SHANGHAI JIAOTONG UNIV
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Patent Information

Application Number
CN202411902034.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2025-11-25
Estimated Expiration
2044-12-23

AI Technical Summary

Technical Problem

Existing anion exchange membrane fuel cells and alkaline electrolyzers face problems such as low OH- conductivity, poor mechanical properties, and insufficient alkaline stability. In particular, under hot alkaline operating conditions, the membrane performance deteriorates and its service life is short.

Method used

Anion exchange membranes were prepared by polymerization and quaternization of azulene polysulfone polymers. The combination of strong dipole moment azulene groups and branched structures formed a hydrogen bond network, which improved the OH- conductivity and mechanical strength, and enhanced the alkali stability.

Benefits of technology

It achieves high OH- conductivity, good mechanical strength and alkaline stability. The anion exchange membrane maintains excellent performance at 80℃ and is suitable for alkaline fuel cells and electrolyzers.

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Abstract

The application discloses a kind of containing azulene group polysulfone anion exchange membrane and preparation method and application thereof, belong to membrane technical field.The application is prepared by polymerization and quaternary ammonium reaction, a series of novel alkali-resistant, high-temperature-resistant basic anion exchange membrane.The polysulfone and its crosslinked polymer have high mechanical strength and thermal stability, which greatly reduces the water absorption and expansion ratio of anion exchange membrane, thereby improving the dimensional stability;Meanwhile, high stability cation group and nucleophilic azulene group functional group increase its basic stability.Its high OH ‑ The high OH conductivity, basic stability and high mechanical strength show that the azulene group polysulfone anion exchange membrane of the application can be used as an anion exchange membrane material for basic fuel cells and basic electrolytic cells.
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