离子交换膜具有延伸平面合结构,可通过π-π堆叠为燃料电池
Yi Han1, Junkai Chai1, Linyi Deng1
1State Key Laboratory of Chemical Resource Engineering, Institute of Modern Catalysis, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
ACS applied materials & interfaces
|December 1, 2025
概括
这项研究引入了 π-π 堆叠相互作用到离子交换膜 (AEM) 中,以增强离子运输和稳定性. 新型AEM在燃料电池方面表现出色,显示出能源应用的巨大潜力.
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:
- 由于传统的微相分离策略,当前的离子交换膜 (AEM) 面临机械性能和维度稳定性的挑战.
- 像接种和混合这样的策略可以损害膜完整性.
研究的目的:
- 开发具有改进的离子导电性和性稳定性的新型AEM.
- 为了利用 π-π 堆叠相互作用来增强自组装和离子运输通道.
- 调查这些AEM在燃料电池应用中的性能.
主要方法:
- 设计和合成固的1,6-stilbenepyrene (1,6-PyE) 分子用于π-π堆叠.
- 准备 QPEmTP-x/QPEpTP-x 具有平面联结构的 AEM.
- 描述AEM属性,包括离子导电性,吸水量,膨胀率和机械强度.
- 长期性稳定性测试.
- 使用DFT和分子动力学模拟来验证实验数据.
- 制造和测试H2/O2燃料电池.
主要成果:
- QPEpTP-15% AEMs 呈现出高OH导电性 (131.8 mS·cm-1),最佳的吸水率 (53.7%) 和低胀率 (15.8%).
- 膜表现出极好的拉伸性能 (36.85 MPa),在2 mol·L-1 NaOH.中在1100小时后保持超过94%的导电率.
- 使用这些AEM的燃料电池在80°C时达到483mW·cm-2的峰值功率密度,并稳定运行超过100小时.
- 模拟证实了关于结构-属性关系的实验发现.
结论:
- 将π-π堆叠相互作用引入化聚 ((aryl-piperidine) 骨架中,可以通过自我组装有效地构建高效的离子运输通道.
- 开发的AEM为实现燃料电池高性能和稳定性提供了一个有希望的途径.
- 这种方法克服了传统方法的局限性,为先进的储能和转换设备铺平了道路.
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