期刊
NANO LETTERS
卷 22, 期 3, 页码 1174-1182出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c04354
关键词
polymer electrolyte fuel cells; hierarchical wrinkle; anfractuous interface; catalyst utilization; ultralow catalyst loading
类别
资金
- Ministry of Trade, Industry & Energy (MOTIE, Korea) [20011712]
- KAIST institute for the Nanocentury
- Commercialization Promotion Agency for R&D Outcomes (COMPA) - Ministry of Science and ICT (MSIT, Korea) [N01210334]
This study reports a fabrication method for hierarchical wrinkled polymer electrolyte membrane/catalyst layer interfaces, which can significantly increase the electrochemically active surface area and power performance. The enhancement factors of the resulting interfaces compared to flat interfaces are among the best observed in previous PEMFCs. The method is simple, scalable, and easily applicable for the design of high-performance PEMFCs.
The optimal architecture of three-dimensional (3D) interface between a polymer electrolyte membrane (PEM) and catalyst layer (CL) is one of the most important issues to improve PEM fuel cells' (PEMFCs) performance. Here, we report the fabrication of hierarchical wrinkled PEM/CL interface over a large area. We fabricated the hierarchical wrinkles on a multiscale from nanometers to micrometers by bottom-up-based facile, scalable, and simple method. Notably, it allows one to go beyond the limit of the catalyst utilization by extremely enlarged interfacial area. The resulting hierarchical wrinkled PEM/CL displays a dramatically increased electrochemically active surface area (ECSA) and power performance by the enhancement factors of 89% and 67% compared with those of flat interface, which is one of the best enhancements compared to previous PEMFCs. We believe the scalability of hierarchical wrinkled interface can be exploited to design advanced 3D interfaces for high-performance PEMFCs even with ultralow Pt-loading.
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