Hydrophobicity gradient optimization of fuel cell gas diffusion media for its application in vehicles  

作　　者：Qinwen Yang Zhen Zhang Gang Xiao Deyi Xue 

机构地区：[1]College of Mechanical and Vehicle Engineering,State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle,Hunan University,Changsha 410082,China [2]School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China [3]Jiangxi Copper Technology Research Institute Co.,Ltd.,Nanchang 330096,China [4]Department of Mechanical and Manufacturing Engineering,University of Calgary,Calgary,Alberta T2N 1N4,Canada

出　　处：《Fundamental Research》2024年第5期1036-1046,共11页自然科学基础研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(51975196 and 52075159);the Virtual Reality Key Application Technology Research(Revealed and Commanded)Project of Jiangxi Province(20213ABC03V01);the High Level and High Skill Leading Talent Training Project of Jiangxi Province,the Jiangxi Provincial Natural Science Foundation(20224ACB218002);the open foundation of State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,Guangxi University(2022GXYSOF24).

摘　　要：During Fuel Cell Vehicle(FCV)operation,the liquid water in gas diffusion media(GDM)prevents the reaction gas from reaching the reaction zone and lead to output power fluctuation and reduce the lifespan of FCV.In the present research,hydrophobicity gradient settings of micro-porous layer(MPL)and gas diffusion layer(GDL)are optimized to improve the water removal ability of GDM.Computational fluid dynamics(CFD)model is constructed for numerical simulations to analyze the fuel cell power output and the water content in the GDM with different hydrophobicity gradients.Experiments with different hydrophobicity gradients,which are specifically prepared with corresponding concentrations of polytetrafluoroethylene(PTFE)solutions,are conducted for validation of simulation results.It is shown that the positive hydrophobicity gradient of MPL and GDL provides a better capacity for water removal and oxygen transport.The contact angles of MPL and GDL are further optimized as 147.9°-138.6°by genetic algorithm integrated with the CFD simulations.

关 键 词：PEMFC Hydrophobicity gradient Water management Fuel cell vehicle OPTIMIZATION 

分 类 号：TM911.4[电气工程—电力电子与电力传动]