双层ePTFE增强膜电极组件通过反向膜沉积工艺制备,用于高性能和耐用的质子交换膜燃料电池
Lei Liu1,2,3, Zhiyong Fu1,2,3, Yijing Xing1,2,3
1State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
ACS applied materials & interfaces
|June 18, 2023
概括
一个新的双层增强膜电极组件 (DR-MEA) 提高了质子交换膜 (PEM) 燃料电池的性能和耐用性. 这种新的MEA制备方法改善了接口特性,减少了降解,为商业化铺平了道路.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 质子交换膜 (PEM) 燃料电池需要高性能和耐用的膜电极组件 (MEA) 才能实现商业可行性.
- 目前的MEA制备方法在优化界面特性和长期耐用性方面面临挑战.
研究的目的:
- 开发一种新的MEA制备方法,以提高性能和耐用性.
- 调查双层扩展聚四乙烯 (ePTFE) 强化对MEA性能的影响.
主要方法:
- 使用反向膜沉积工艺与ePTFE增强技术相结合.
- 使用双层ePTFE增强骨架 (DR-MEA) 制造的新型MEAs.
- 通过催化剂涂层膜方法制备的传统MEAs (C-MEA) 与DR-MEA的性能和耐用性进行比较.
主要成果:
- 形成DR-MEA的结果是一个紧密的3D质子交换膜/催化剂层 (PEM/CL) 接口.
- 在DR-MEA中显著增加了电化学表面积,降低了界面电阻,并提高了功率性能.
- 在压力测试后,与C-MEA相比,DR-MEA的机械和化学降解明显减少 (湿/干循环,开放电路电压耐用性).
结论:
- 由于双层ePTFE钢筋,DR-MEA具有卓越的界面性能和增强的耐用性.
- 这种新的制备方法有效地解决了MEA降解问题,促进了PEM燃料电池的商业化.
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