Impact of compression on gas transport in non-woven gas diffusion layers of high temperature polymer electrolyte fuel cells

被引：40

作者：

Froning, Dieter ^{[1
]}

Yu, Junliang ^{[1
]}

Gaiselmann, Gerd ^{[2
]}

Reimer, Uwe ^{[1
]}

Manke, Ingo ^{[3
]}

Schmidt, Volker ^{[2
]}

Lehnert, Werner ^{[1
,4
]}

机构：

[1] Forschungszentrum Julich, Inst Energy & Climate Res, IEK Electrochem Proc Engn 3, D-52425 Julich, Germany

[2] Univ Ulm, Inst Stochast, D-89069 Ulm, Germany

[3] Helmholtz Zentrum Berlin GmbH, Inst Appl Mat, D-14109 Berlin, Germany

[4] Rhein Westfal TH Aachen, Modeling Electrochem Proc Engn, Aachen, Germany

来源：

JOURNAL OF POWER SOURCES | 2016年 / 318卷

关键词：

HT-PEFC; GDL; Lattice Boltzmann; Stochastic modeling; LOCAL CURRENT DISTRIBUTION; CROSS-FLOW; PERMEABILITY; PERFORMANCE; TORTUOSITY; POROSITY; WATER;

D O I：

10.1016/j.jpowsour.2016.03.102

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：

Gas transport in non-woven gas diffusion layers of a high-temperature polymer electrolyte fuel cell was calculated with the Lattice Boltzmann method. The underlying micro structure was taken from two sources. A real micro structure was analyzed in the synchrotron under the impact of a compression mask mimicking the channel/rib structure of a flow field. Furthermore a stochastic geometry model based on synchrotron X-ray tomography studies was applied. The effect of compression is included in the stochastic model. Gas transport in these micro structures was simulated and the impact of compression was analyzed. Fiber bundles overlaying the micro structure were identified which affect the homogeneity of the gas flow. There are significant deviations between the impact of compression on effective material properties for this type of gas diffusion layers and the Kozeny-Carman equation. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：26 / 34

页数：9

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