机械坚固的纳基无水质质交换膜具有高质子导电性和高效的现场自我修复能力
Yixuan Li1, Zheyi Wang1, Guitian Tai1
1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Macromolecular rapid communications
|May 12, 2025
概括
新的自愈高温质子交换膜 (HT-PEM) 显示出了显著的机械强度和质子导电性. 这些先进的膜可以在操作过程中修复损坏,提高燃料电池的可靠性.
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:
- 对于具有提高机械强度和质子导电性的高温质子交换膜 (HT-PEM) 的需求日益增加.
- 现有的HT-PEM往往缺乏自我愈合能力,限制了它们在压力下的运行寿命和可靠性.
研究的目的:
- 制造机械强大的HT-PEM,具有现场自愈特性.
- 为了提高质子导电性和在高温下机械弹性.
- 通过集成的愈合机制提高HT-PEM燃料电池的可靠性.
主要方法:
- 通过复合纳,酸 (PW) 集群和离子液 (ILs) 来制造N-IL-PW膜.
- 机械性能的表征,包括在高温下 (高达170°C) 的抗爬和抗疲劳性.
- 在无水条件下对质子导电性的评估和燃料电池性能测试.
主要成果:
- N-IL-PW膜表现出优异的高温爬行和耐疲劳性,这是由于协同的静电和结合相互作用.
- 在≈170°C时达到≈18.86mS cm-1的高无水质子导电性.
- 在燃料电池运行条件下,已证明能在现场治愈疲劳和机械损坏,恢复膜特性和性能.
结论:
- 开发的N-IL-PW膜为可靠的高温燃料电池应用提供了有前途的解决方案.
- 机械强度,高质子导电性和自我修复能力的结合显著提高了膜的耐用性.
- 可逆相互作用是现场愈合机制的关键,确保持续的性能和可靠性.
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