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键和双极-双极相互作用使燃料电池的超稳定,快速响应和自我愈合的质子交换膜成为可能
Shanyun Mo1,2, Zihui Li1, Junda Chen1
1Huangpu Hydrogen Energy Innovation Centre/School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
ACS omega
|June 24, 2024
概括
这项研究引入了燃料电池的自我修复的质子交换膜 (PEM). 新的膜将PFSA与HFBA-co-AA共聚合物混合,显著提高耐用性和机械完整性,解决了燃料电池的关键限制.
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:
- 质子交换膜 (PEMs) 对于燃料电池的运行至关重要,但遭受机械降解,如微裂.
- 这种降解导致设备寿命缩短和安全问题,凸显了对更耐用的PEMs的需求.
- 自愈PEM非常理想,但在质子交换膜燃料电池 (PEMFCs) 的实际应用方面仍然不发达.
研究的目的:
- 通过将新型共聚合物与标准的硫酸 (PFSA) 材料集成,开发一个维度稳定和自我修复的PEM.
- 通过提高自我修复能力,提高燃料电池应用的PEM的机械强度和寿命.
- 研究特定聚合物相互作用在混合膜中实现高效的自我愈合特性中的作用.
主要方法:
- 合成了一种新型的自我修复性共聚合物,即六甲基烯酸-烯酸 (HFBA-co-AA).
- 将合成的HFBA-co-AA共聚合物与成熟的 perfluorinated sulfonic acid (PFSA) 材料混合在一起,以创建一个新的PEM.
- 在PFSA和HFBA-co-AA之间调整了键和二极管-二极管相互作用,以优化自我愈合性能.
- 通过测量在高温下发生机械损坏后抗拉强度的恢复来评估自愈效率.
主要成果:
- 开发的PFSA/HFBA-co-AA膜显示出显著的自我愈合能力.
- 膜在80°C20分钟的短时间内恢复了43.6%的原始抗拉强度.
- 加入HFBA-co-AA共聚合物被认为是提高混合膜自我愈合效率的关键.
结论:
- 该研究成功开发了一种尺寸稳定和自我愈合的PEM,具有增强的耐用性.
- 新型PFSA/HFBA-co-AA膜为克服燃料电池中的机械降解问题提供了一个有希望的解决方案.
- 这项研究为为先进的燃料电池技术开发更可靠和更持久的PEM铺平了道路.
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