质子交换膜燃料电池
气体扩散
多孔性
磁导率
燃料电池
表征(材料科学)
膜
化学工程
化学
材料科学
机械工程
工艺工程
纳米技术
工程类
复合材料
生物化学
作者
L. Cindrella,Arunachala Mada Kannan,Jiewei Lin,K. Saminathan,Yuh‐Shan Ho,Chuen−Chang Lin,Julie Wertz
标识
DOI:10.1016/j.jpowsour.2009.04.005
摘要
Gas diffusion layer (GDL) is one of the critical components acting both as the functional as well as the support structure for membrane–electrode assembly in the proton exchange membrane fuel cell (PEMFC). The role of the GDL is very significant in the H2/air PEM fuel cell to make it commercially viable. A bibliometric analysis of the publications on the GDLs since 1992 shows a total of 400+ publications (>140 papers in the Journal of Power Sources alone) and reveals an exponential growth due to reasons that PEMFC promises a lot of potential as the future energy source for varied applications and hence its vital component GDL requires due innovative analysis and research. This paper is an attempt to pool together the published work on the GDLs and also to review the essential properties of the GDLs, the method of achieving each one of them, their characterization and the current status and future directions. The optimization of the functional properties of the GDLs is possible only by understanding the role of its key parameters such as structure, porosity, hydrophobicity, hydrophilicity, gas permeability, transport properties, water management and the surface morphology. This paper discusses them in detail to provide an insight into the structural parts that make the GDLs and also the processes that occur in the GDLs under service conditions and the characteristic properties. The required balance in the properties of the GDLs to facilitate the counter current flow of the gas and water is highlighted through its characteristics.
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