Polytetrafluorethylene effects on liquid water flowing through the gas diffusion layer of polymer electrolyte membrane fuel cells

被引：28
作者：
Yu, Junliang [1 ]
Froning, Dieter [1 ]
Reimer, Uwe [1 ]
Lehnert, Werner [1 ,2 ,3 ]
机构：
[1] Forschungszentrum Julich, Inst Energy & Climate Res IEK 3 Electrochem Proc, D-52425 Julich, Germany
[2] Rhein Westfal TH Aachen, Modeling Electrochem Proc Engn, D-52056 Aachen, Germany
[3] JARA HPC, D-52425 Julich, Germany
来源：
JOURNAL OF POWER SOURCES | 2019年 / 438卷
关键词：
Lattice Boltzmann method; Polymer electrolyte membrane fuel cell; Gas diffusion layer; Polytetrafluoroethylene; Two-phase flow; RAY COMPUTED-TOMOGRAPHY; LATTICE BOLTZMANN MODEL; BOUNDARY-CONDITIONS; MASS-TRANSPORT; PEMFC; COMPRESSION; SIMULATION; IMPACT; GDL; MICROSTRUCTURE;
D O I：
10.1016/j.jpowsour.2019.226975
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A three-dimensional (3D) lattice Boltzmann model is applied to simulations of the dynamic process of liquid water moving through the gas diffusion layer, processed by covering the fibers with polytetrafluorethylene (PTFE), in polymer electrolyte membrane fuel cells. The PTFE content and two through-plane distribution styles were analyzed regarding their impact on the liquid water's flow behavior. The total saturation curves show that the water's breakthrough times are affected by these two factors. Different characteristic shapes of local saturation curves are observed with different types of PTFE distribution. The dynamic elevation plots of water fronts show that certain PTFE distribution styles can be of advantage to fuel cell efficiency.
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页数：12
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