启用质子运输功能的碳支持,以提高燃料电池性能和耐用性
Venkata Yarlagadda1, Nathan Mellott1, Swami Kumaraguru1
1Global Fuel Cell Business, General Motors LLC, 850 N. Glenwood Avenue, Pontiac, Michigan 48340, United States.
ACS applied materials & interfaces
|November 20, 2023
概括
一种新的君主碳材料增强了质子交换膜 (PEM) 燃料电池中的质子导电性. 这种新的支可以使电极具有显著较低的离子体含量,提高性能和耐用性.
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
- 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) 燃料电池对于清洁能源至关重要.
- 开发高效,具有成本效益的催化剂支对于它们的广泛采用至关重要.
- 减少电极中的离子体含量是提高燃料电池性能的一个关键挑战.
研究的目的:
- 评估一种新的君主碳材料作为PEM燃料电池的阴极催化剂支.
- 为了研究碳支持的表面功能群对质子导电性的影响.
- 为了评估设计电极的可行性,减少了使用君主碳的离子元素含量.
主要方法:
- X射线光电子光谱 (XPS) 用于确认表面功能组 (硫酸).
- 动态蒸汽吸附 (DVS) 用于测量水吸收.
- 电化学阻抗光谱 (EIS) 用于评估质子导电性.
- 燃料电池性能和耐用性测试.
主要成果:
- 国王碳表现出硫酸功能和更高的吸水率.
- 与PtCo/C相比,PtCo/Monarch电极表现出更高的质子导电性,尤其是在低离子体与碳 (I/C) 比率下.
- 使用PtCo/Monarch的电极含有75%较少的离子体含量显示出更好的高电流密度性能和耐用性.
结论:
- "君主碳"是用于PEM燃料电池催化剂支的有希望的材料.
- 它固有的质子导电能力允许显著减少离子体负荷.
- 这一进步可能会导致更高效和更具成本效益的PEM燃料电池设计.
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