湖南大学学报（自然科学版）2016，Vol.43Issue(12)：50-55,6.
PEM燃料电池膜电极中的水传输行为∗
Water Flow in and around the MEA of PEM Fuel Cell
摘要
Abstract
In order to avoid the “water flooding”,the excess water generating in PEM fuel cell should be drained timely.In this study,an experiment model was applied to analyze the path of water flow corre-sponding to the flow resistances based on the“flooding”between catalyst layer (CL)and gas diffusion lay-er (GDL).Narrow apertures in the largest pores of carbon paper gas diffusion layer are the primary resist-ance to liquid water penetration.After sufficient hydrostatic pressure is applied,water penetrates the lim-iting aperture and flows through the pore reaching the GDL surface.For the carbon paper GDL material, the pressure(~1 kPa)required for water to flow through the pores is much less than the pressure (~6 kPa)to penetrate the limiting aperture of the pores.Adding micro-porous layer (MPL)can obviously in-crease water penetrate resistance.The content of Teflon in the MPL has little effect on the water penetra-tion pressure.It is helpful to promote the water management in fuel cell by setting pilot holes on the car-bon paper GDL material.关键词
燃料电池/水传输/气体扩散层/限制孔/渗透压力Key words
fuel cell/water flow/gas diffusion layer/limiting aperture/penetration pressure分类
信息技术与安全科学引用本文复制引用
叶东浩,詹明,潘牧..PEM燃料电池膜电极中的水传输行为∗[J].湖南大学学报（自然科学版）,2016,43(12):50-55,6.基金项目
国家高技术研究发展计划(863计划)项目(2013AA110201) （863计划）
美国国家科学基金资助项目(0903661) （0903661）
