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Updated: Jun 6, 2025

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含有高功率密度和增强质子导电性的聚合离子液体的半透型聚胺醇膜用于燃料电池

Shuyu Zhang¹, Yu Luo¹, Di Yu¹

¹School of Chemical Engineering, Changchun University of Technology, Changchun 130012, People's Republic of China.

Journal of colloid and interface science

|November 29, 2024

概括

研究人员开发了一种用于高温质子交换膜 (HT-PEMs) 的新复合膜. 这种膜增强了酸 (PA) 的吸收和保留,提高了机械强度和质子导电性,以提高燃料电池性能.

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:

高温质子交换膜 (HT-PEMs) 需要高酸 (PA) 兴奋剂以获得高效的质子导电性.
在聚胺醇 (PBI) 膜中过度的PA兴奋剂会损害机械强度和细胞性能.
开发具有改善PA吸收,机械完整性和保留力的膜对于先进的HT-PEM应用至关重要.

研究的目的:

为HT-PEMs设计一种新的复合膜,克服传统PBI膜的局限性.
为了同时增强PA吸收,机械强度和PA保留.
研究一种新型离子液 (IL) 和其衍生的聚合离子液 (PIL) 对膜性质和性能的影响.

主要方法:

通过自由基聚合合成了一种具有双键与PBI交联的亚酸类型离子液体 (IL).
通过将IL与PBI交联并允许IL自聚合成为PIL,创建了一个半互穿透的聚合物网络 (sIPN).
制造的复合膜 (AmPBI-PIL-X) 含有不同的IL含量,并评估了它们的PA吸收,机械性能,质子导电性和燃料电池性能.

主要成果:

在无水环境中,AMPBI-PIL-30膜在180°C时实现了138.2mS cm-1的质子导电性.
膜表现出很好的PA保留,在180°C下在160°C/0%RH下240小时后保持99.4mS cm−1质子导电率.
在160°C时,AMPBI-PIL-10膜实现了635.4mW cm-2的显著功率密度.

结论:

开发的AMPBI-PIL-X复合膜在HT-PEM应用中表现出卓越的性能.
该sIPN结构有效地提高机械强度和PA保留.
这一战略为设计具有优越性质的先进膜为高温燃料电池提供了有前途的途径.

关键词:

高功率密度的高功率密度.高温质子交换膜高温质子交换膜吸收PA的时间聚合物离子液体聚合物离子液体半互穿透网络半互穿透网络

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