从固化液体前体中成型的高表面积聚合物电解质膜
Zhilian Zhou1, Raymond N Dominey, Jason P Rolland
1Department of Chemistry and the Institute for Advanced Materials, Nanoscience and Technology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
Journal of the American Chemical Society
|September 28, 2006
概括
燃料电池的新聚合物电解质膜 (PEM) 由液体前体制成. 这些交联的PEM提供高质子导电性,并使图案膜电极组件能够提高燃料电池性能.
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:
- 聚合物电解质膜 (PEM) 是燃料电池中的关键组件.
- 传统的PEM经常面临水溶性和加工限制的挑战.
- 在不损害机械完整性的情况下实现高质子导电性是一个关键的挑战.
研究的目的:
- 开发用于燃料电池的新型,易于加工的聚合物电解质膜 (PEM).
- 为了提高质子导电性,并克服PEM中的水溶性问题.
- 探索使用图案膜来提高燃料电池性能.
主要方法:
- 从低分子量,100%可治愈的液体前体合成PEMs.
- 光化学固化以形成具有所需尺寸的固体膜.
- 通过化学交叉链接将酸性群体纳入.
- 使用平面和有图案的PEM制造膜电极组件 (MEAs).
- 软光刻和微型成型技术用于创建3D图案膜.
主要成果:
- 高质子导电性固体PEMs已经成功地直接从液体前体中合成.
- 交叉连接阻止了水溶性,同时允许高水平的酸性群体用于导电性.
- 使用这些PEM的燃料电池与商业材料相比,表现优越.
- 通过软光刻绘制创建的有图案的PEM在MEAs中产生了更大的界面面积和更高的功率密度.
- 3D图案膜可以实现更高的功率密度,而不会增加燃料电池的整体尺寸.
结论:
- 开发的液体前体路径为制造先进的PEM提供了一种多功能和高效的方法.
- 化学交联在实现高质子导电性和材料稳定性方面是有效的.
- 有模式的PEM代表了小型化燃料电池和提高便携式应用功率密度的有希望的策略.
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