高质子导电性和低膨胀的聚合物膜,通过水友性共价交联实现
Chengzhi Cui1, Peng Sun1, Yan Wang1
1School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR. China.
Journal of colloid and interface science
|June 12, 2024
概括
新型分支聚胺醇膜为燃料电池提供了增强的质子导电性和耐用性. 共价交联提高了稳定性,克服了质子交换膜技术的关键局限性.
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
- 聚合物化学 聚合物化学
背景情况:
- 质子交换膜 (PEM) 对燃料电池至关重要,但在质子导电性和运行耐用性之间面临着权衡.
- 主要的耐用性挑战包括尺寸稳定性,机械强度和抗氧化能力.
研究的目的:
- 开发新的质子交换膜,克服导电性-耐久性权衡.
- 为了合成和表征与 (3-) 三氧化 (CTS) 交联并用FeATMP添加的分支聚胺醇 (brPBI) 膜.
主要方法:
- 合成分支聚胺醇 (brPBI) 具有优化的分支度.
- brPBI与 (3-) 三西兰 (CTS) 的共价交联.
- 用一种新型的质子导体,FeATMP,对复合膜进行兴奋剂.
主要成果:
- brPBI-CTS/FeATMP膜表现出增强的质子导电性 (0.136 S cm-1在180°C和100%的RH) 和改进的尺寸稳定性 (4.69%的膨胀).
- 在brPBI中优化分支增加了自由体积和终端组,提高了质子导电和稳定性.
- 与CTS的共价交联增强了机械,维度和氧化稳定性,同时促进了用水辅助的质子导电.
结论:
- 通过共价交叉连接构建水友结构是打破PEM中权衡效应的有效策略.
- 开发的brPBI-CTS/FeATMP膜显示了先进燃料电池应用的巨大潜力.
- 这种方法为高性能,持久的质子交换膜提供了一条途径.
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