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直接甲醇燃料电池的自愈硫化聚乙基聚合物电解质膜:溶剂含量的影响

Mae Hwa Tai¹, Hui San Thiam^1,2, Shiau Foon Tee¹

¹Lee Kong Chian Faculty of Engineering & Science, Universiti Tunku Abdul Rahman, Sungai Long Campus, Jalan Sungai Long, Bandar Sungai Long, Kajang 43000, Selangor, Malaysia.

|December 23, 2023

概括

这项研究开发了一种使用硫化聚乙 (SPEEK) 和聚乙醇 (PVA) 进行直接甲醇燃料电池 (DMFC) 的自我修复的质子交换膜 (PEM). 优化的膜显示出出色的甲醇屏障特性和耐用性.

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:

质子交换膜 (PEM) 对燃料电池技术至关重要.
在直接甲醇燃料电池 (DMFC) 中常见的PEMNafion具有高质子导电性,但也具有高甲醇透性和降解问题.
需要先进的PEM,具有增强的耐用性和甲醇屏障特性.

研究的目的:

通过混合硫化聚乙 (SPEEK) 和聚乙醇 (PVA) 来开发一种新的,可治愈的PEM.
调查N,N-二甲基胺 (DMAc) 溶剂度对膜性质的影响.
优化PEM性能,以提高DMFC中的耐久性和甲醇耐受性.

主要方法:

使用不同度的DMAc溶剂制造SPEEK/PVA混合膜.
膜性质的表征,包括吸水性,质子导电性和甲醇透性.
评估已开发的膜的自我愈合能力和耐用性.

主要成果:

较低的DMAc度提高了水的吸收和质子导电性,但增加了甲醇的透性.
使用10%重量%DMAc溶剂 (SP10) 的混合膜显示出最佳的权衡,实现了高选择性.
SP10表现出显著的自我愈合,恢复了其88%的甲醇阻断效率,在更高的溶剂度下愈合能力下降.

结论:

优化DMAc溶剂度对于定制DMFC中的PEM性能至关重要.
开发的SPEEK/PVA混合膜具有优异的甲醇屏障和自我愈合特性.
这种开创性的膜为高效和耐用的燃料电池系统提供了潜力.

关键词:

这是一种PVA.斯佩克的意思是说话.质子交换膜中的质子交换它具有自我愈合的功能.溶剂溶剂的使用方法

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