阳离子导电块聚乙烯:合成,特性和性燃料电池中的应用
Manabu Tanaka1, Keita Fukasawa, Eriko Nishino
1Fuel Cell Nanomaterials Center, University of Yamanashi, 4 Takeda, Kofu 400-8510, Japan.
Journal of the American Chemical Society
|June 11, 2011
概括
新的阳离子导电多块共聚合物为燃料电池提供了优越的氧化离子导电性和耐久性. 这些四分化聚烯以太在氨酸燃料电池中表现出色,为先进的储能解决方案铺平了道路.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 开发高效的离子交换膜 (AEM) 对性燃料电池至关重要.
- 现有的AEM往往由于导电性,稳定性或成本过高而受到损害.
- 芳香的多块共聚合物提供可调节的特性,以改善离子传输和机械强度.
研究的目的:
- 为了合成和表征新的离子导电性芳香多块共聚合物 (QPE) 与四元化氨基替代基.
- 为了评估这些QPE作为直接素燃料电池膜的性能.
- 评估开发的膜的导电性,相位分离和耐用性.
主要方法:
- 阻断水友和疏水性寡合物的共聚凝聚.
- 甲基化,四化和离子交换反应以引入功能组.
- 扫描传输电子显微镜 (STEM) 用于结构分析.
- (1) 用H NMR光谱进行降解评估.
- 燃料电池测试用于评估性能.
主要成果:
- 成功合成了具有良好控制的多块结构的柔性,透明的QPE膜.
- 实现了显著的疏水/疏水相分离和相互连接的离子运输通路.
- 证明了高的氧离子导电性 (在80°C时高达144mS/cm),超过了现有的AEM.
- 具有出色的耐用性,在80°C的热水中在5000小时后保持高导电性.
- 在80°C下运行无贵金属的直接氨酸燃料电池,最大功率密度为297mW/cm.
结论:
- 对于离子导电应用,QPE膜表现出有前途的性能,特别是在燃料电池中.
- 多块架构是实现高离子导电性和机械稳定性的关键.
- 这些材料在开发用于清洁能源技术的高性能,耐用AEM方面取得了重大进展.
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