基于聚烯氧化物和聚乙烯醇的弹性和导电交联离子交换膜,用于H2 -O2燃料电池
Juanjuan Han1, Yangyang Zhang1, Xiumeng Zheng1
1School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, P. R. China.
ChemSusChem
|September 12, 2023
概括
新的交联离子交换膜 (AEMs) 结合了刚性聚烯氧化物和柔性聚乙烯醇,显示出增强的机械强度和离子导电性. 这些AEM表现出优异的化学稳定性,使它们成为燃料电池应用的前景.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物化学 聚合物化学
背景情况:
- 开发高性能离子交换膜 (AEM) 对性燃料电池至关重要.
- 现有的AEM经常面临机械强度,离子导电性和长期稳定性的挑战.
- 结合刚性和灵活的聚合物骨干,可以在材料性能上提供协同改进.
研究的目的:
- 使用聚烯氧化物 (PPO) 和聚乙烯醇 (PVA) 合成和表征新型交联AEM (c-DQPPO/PVA).
- 调查双离子接种和甲交叉链接对离子交换能力 (IEC),机械性能和胀的影响.
- 评估开发的AEMs的离子导电性,化学稳定性和燃料电池性能.
主要方法:
- 通过结合PPO和PVA来合成交联的AEM (c-DQPPO/PVA).
- 在PPO骨干上植入双,并引入甲基以进行交叉链接.
- 包括机械测试,离子导电量测量,IEC测定,膨胀比分析和性介质中的化学稳定性测试在内的AEM的表征.
主要成果:
- c-DQPPO/PVA膜具有增强的机械性能 (抗拉强度:12.5 MPa,破裂时延长:53.0%) 由于刚性-灵活交叉连接网络.
- 获得了高离子导电性 (125.7 mS cm-1) 和IEC (3.05 mmol g-1),这归因于PVA的水友性和有利的形态.
- 膜在长时间暴露于80°C的1M NaOH后,表现出出色的化学稳定性和低降解率,并在H2-O2燃料电池中达到0.751W cm−2的峰值功率密度.
结论:
- 开发的c-DQPPO/PVA AEMs提供了机械强度,高离子导电性和出色的化学稳定性的有希望的组合.
- 刚性-柔性骨干,双离子接种和交叉链接的协同效应有助于卓越的性能.
- 这些发现凸显了c-DQPPO/PVA-7.5作为性燃料电池应用中可行的材料的潜力.
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