基于高离子导电性和性稳定性高的多化离子交换膜) 的新型化离子交换膜用于燃料电池应用
Qijia Li1, Liming Wu1, Yang Pang1
1Key Laboratory of High Performance Plastics, Ministry of Education, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Macromolecular rapid communications
|February 16, 2024
概括
新的交膜 (AEMs) 具有多 (pentafluorophenylcarbazole) 骨干,显示出增强的离子导电性和稳定性. 这些AEM通过明确的微相分离来改善离子运输,以获得更好的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 电化学 电化学 电化学
背景情况:
- 阳离子交换膜 (AEM) 对电化学设备至关重要.
- 在AEM中提高离子导电性和化学稳定性对于性能至关重要.
- 设计聚合物骨干和离子导体组会影响AEM的特性.
研究的目的:
- 设计和准备具有多 (pentafluorophenylcarbazole) 骨干的新型AEM.
- 为了研究不同基群对AEM形态和特性的影响.
- 增强在AEMs中的离子导电性和化学稳定性之间的权衡.
主要方法:
- 基于多 (pentafluorophenylcarbazole) 骨干的AEMs的合成.
- 在聚合物骨干上移植不同的阴离子组.
- 微相分离形态和离子传输的表征.
- 在性条件下测量离子导电性和化学稳定性.
- 在电化学设备中评估单细胞性能.
主要成果:
- 一系列的AEMs成功地准备好了明确的微相分离.
- 疏水性化骨干和基间隔剂促进了相位分离和离子运输通道.
- 在80°C时,PC-PF-QA膜实现了123mS cm-1的离子导电性.
- PC-PF-QA膜表现出极好的化学稳定性,在960小时后,电导率仅下降了6%,在60°C的1M NaOH中.
- 单个电池的最大峰值功率密度为214mW cm−2,使用PC-PF-QA膜在60°C时实现.
结论:
- 基于多 (五二基) 骨干设计的AEM显示出对AEM应用有前途的性能.
- 有效的微相分离是实现高离子导电性和稳定性的关键.
- 这些新型AEM为当前AEM技术中的性能权衡提供了潜在的解决方案.
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