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基于燃料电池内在微孔性聚合物的持久质子交换膜

Xiaochen Yang¹, Zhiming Feng¹, Mustafa Alshurafa²

¹Department of Chemical Engineering, The University of Manchester, Manchester, M13 9PL, UK.

Advanced materials (Deerfield Beach, Fla.)

|March 27, 2025

概括

新的复合膜使用内在微孔性的碳酸改性聚合物 (cPIM-1) 和聚乙烯 (PVP) 显著提高高温质子交换燃料电池 (HT-PEMFC) 的性能和耐用性,通过防止酸出.

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
能源转换能源转换

背景情况:

高温质子交换膜燃料电池 (HT-PEMFCs) 提供了诸如简化水管理和燃料杂质耐受性等优势.
酸 (PA) 浸出是一个主要的挑战,限制了当前HT-PEMFCs的能量密度和耐用性.
开发先进的膜对于HT-PEMFC技术的商业可行性至关重要.

研究的目的:

为HT-PEMFCs设计和合成新的复合膜,以克服酸出.
为了提高膜兼容性,质子导电性,以及燃料电池的整体性能和耐用性.
研究复合膜的结构-性质关系,以优化酸保留.

主要方法:

复合膜的制造方法是通过将内在微孔性的碳酸改性聚合物 (cPIM-1) 与聚烯 (PVP) 混合而成.
膜性质的表征,包括兼容性,微孔结构,疏水性和酸保留.
使用开发的PVP/cPIM-1复合膜制造和测试HT-PEMFCs.

主要成果:

cPIM-1和PVP混合物形成了一个广泛的结网络,改善了膜兼容性.
优化的结构导致了"域有限"的PA集群,增强了毛细管效应和质子转移.
带有PVP/cPIM-1膜的HT-PEMFC在160°C时达到1090.0mW cm-2的峰值功率密度,比PVP/PES提高了152%.
在210小时加速应力测试中,表现出极好的耐用性,电压衰减为0.058 mV h-1 .

结论:

开发的PVP/cPIM-1复合膜有效地减轻了HT-PEMFC中的酸出.
与传统膜相比,这些膜表现出优越的性能和耐用性.
这一战略为推进用于能源转换系统的高性能和耐用膜提供了一个有前途的途径.

关键词:

在PIM-1中,PIM-1是PIM-1的代号.燃料电池燃料电池的使用情况微孔结构是一种微孔结构.酸是一种酸.质子交换膜中的质子交换膜.

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