渗透(战争)
质子交换膜燃料电池
多孔性
耐久性
材料科学
复合材料
相对湿度
湿度
毛细管作用
气体扩散
磁导率
膜
穿透深度
化学工程
化学
燃料电池
工程类
物理
光学
热力学
生物化学
运筹学
作者
Junhyun Cho,Jae-Man Park,Hwanyeong Oh,Kyoungdoug Min,Eun-Sook Lee,Jy-Young Jyoung
标识
DOI:10.1016/j.apenergy.2013.05.022
摘要
The optimal design of the gas diffusion layer (GDL) of proton exchange membrane fuel cells is crucial because it directly determines the mass transport mechanism of the reactants and products. In this study, the micro-porous layer (MPL) penetration thickness, which affects the pore size profile through the GDL, is varied as the design parameter of the GDL. The cell performance is investigated under various humidity conditions, and the water permeability characteristics are studied. In addition, the accelerated carbon corrosion stress test is conducted to determine the effect of MPL penetration on GDL degradation. GDLs with large MPL penetration thickness show better performance in the high-current–density region due to the enhanced management of water resulting from a balanced capillary pressure gradient. However, the loss of penetrated MPL parts is observed due to the low binding force between the MPL and the GDL substrate.
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