期刊
ACS APPLIED ENERGY MATERIALS
卷 2, 期 11, 页码 7757-7761出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.9b01871
关键词
PEMFC; GDE; MPL; surface roughness; ionomer overlayer; interface; MEA structure
资金
- U.S. Department of Energy (DOE) [DE-AC36-08GO28308]
- U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Fuel Cell Technologies Office
- U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Advanced Manufacturing Office
This study explores the role of the gas diffusion media microporous layer (MPL) surface structure on the electrochemical properties of gas-diffusion-electrode (GDE)-based membrane electrode assemblies (MEAs). It has been shown that a thin ionomer layer on top of the GDE and hot pressing is needed to create good contact between the catalyst layer and the membrane. In this study, gas diffusion media with different MPL surface roughness were applied to fabricate GDE-based MEAs to understand how MPL roughness impacts the amount of ionomer overlayer required for maximum performance. Electron microscopy was employed to investigate MPL/catalyst layer and catalyst layer/membrane interfaces. In-situ performance testing was used to assess the impact of MPL roughness and ionomer overlayer on catalyst utilization and air polarization performance. We find that a smoother MPL surface required a thinner ionomer overlayer than gas diffusion media (GDM) with a rougher MPL surface to achieve a performance comparable to direct-coated catalyst-coated-membrane MEAs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据