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Updated: Jul 19, 2025

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多离子液体) /OPBI复合膜具有优异的化学稳定性,用于高温质子交换膜

Yiming Xiao^1,2, Haoran Chen^1,2, Ranxin Sun^1,2

¹Department of Chemical Engineering and Material Science, Tianjin University of Science & Technology, Tianjin 300457, China.

|August 12, 2023

概括

将聚合离子液体 (PIL) 添加到聚胺醇 (PBI) 膜中,可显著提高高温质子交换膜燃料电池 (HT-PEMFC) 的质子导电性和化学稳定性. 这种增强可以延长燃料电池组件的使用寿命.

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
化学工程是化学工程的重要组成部分.

背景情况:

酸 (PA) 化聚胺醇 (PBI) 膜由于高质子导电性,对高温质子交换膜燃料电池 (HT-PEMFC) 是有前途的.
然而,由于化学稳定性问题,它们的运行寿命受到限制.

研究的目的:

为了提高HT-PEMFCs的PA-doped PBI膜的质子导电性和化学稳定性.
研究聚合离子液体 (PIL) 在提高膜性能和耐用性方面的作用.

主要方法:

将聚合的[HVIM]H2PO4离子液体 (PIL) 纳入OPBI膜矩阵.
调整PIL的内在粘度,以优化与OPBI链的纠.
在180°C的质子导电性和在恶劣的氧化条件下 (H2O2/Fe2+) 的化学稳定性的评估.

主要成果:

该PIL/OPBI膜 (2.34-PIL/OPBI) 在180°C时实现了113.9mS·cm-1的质子导电性,比原始OPBI膜增加3.5倍.
2.34-PIL/OPBI膜表现出卓越的化学稳定性,在恶劣条件下保持92.1%的重量,并且在机械强度和导电性方面降低了降解.
增强PIL和OPBI链之间的纠可以防止PIL损失和氧化降解.

结论:

将PIL与OPBI混合为改善PA-PBI膜的化学耐用性提供了一个简单而有效的策略.
开发的PIL/OPBI膜显示出作为燃料电池应用的先进HT-PEM具有重大潜力.
优化的PIL链是防止材料降解和确保长期性能的关键.

关键词:

在HT-PEM中使用HT-PEM 化学稳定性化学稳定性聚离子液体) 是一种多离子液体.聚胺醇是一种多胺.

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