复合离子交换膜含有长侧链离子体和脱皮的状双氧化物
Riccardo Narducci1, Suanto Syahputra2, Maria Luisa Di Vona1
1LIME Laboratory, Department of Industrial Engineering, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy.
Membranes
|December 27, 2024
概括
复合离子交换膜 (AEM) 具有Mg/Al分层双氧化物 (LDH) 填充剂,显示出增强的机械刚性和离子导电性. 5%的LDH复合物表现出改善的性稳定性,这对于燃料电池和电解剂至关重要.
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
- 聚合物科学 聚合物科学
背景情况:
- 离子交换膜 (AEM) 对燃料电池和电解剂等电化学设备至关重要.
- 在性条件下,AEMs的耐用性较差,限制了它们的应用.
- 具有稳定的无机填充剂的复合离子体为增强AEM稳定性提供了一个潜在的解决方案.
研究的目的:
- 开发和描述使用长侧链 (PPO-LC) 和Mg/Al分层双氧化物 (LDH) 填充剂上的四级基的聚2,6-二甲基-1,4-氧化物复合离子交换膜.
- 评估不同LDH百分比 (2%,5%,10%) 对膜性质的影响,包括机械刚性,离子导电性和性稳定性.
- 研究LDH对四级基的性降解的保护机制.
主要方法:
- 复合膜是通过在不同负载下将脱皮的Mg/Al LDH纳入PPO-LC聚合物矩阵来制造的.
- 评估了机械刚性,并在不同的温度和相对湿度 (RH) 条件下测量了离子导电性.
- 使用热重力测量分析 (TGA) 评估性稳定性,并在暴露于80°C的2MKOH后监测导电性和吸水量,持续48小时.
主要成果:
- 结合脱皮的LDH显著增加了机械刚性,特别是高达5%的负载.
- 使用5%LDH的复合膜表现出最大的离子导电性.
- 5%的LDH复合物显示出改善的性稳定性,与整洁膜的36%相比,仅有19%的降解,表明LDH具有保护作用.
结论:
- 包含Mg/Al LDH的复合离子交换膜显示了增强的机械和电化学性能.
- 5%的LDH复合物表现出优越的性稳定性,解决了传统AEM的关键局限性.
- LDH作为四级基的保护剂,为使用各种LDH化合物和脱皮技术的先进AEM开发铺平了道路.
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