Pore network modeling to explore the effects of compression on multiphase transport in polymer electrolyte membrane fuel cell gas diffusion layers

被引：70

作者：

Fazeli, Mohammadreza ^{[1
]}

Hinebaugh, James ^{[1
]}

Fishman, Zachary ^{[1
]}

Toetzke, Christian ^{[2
]}

Lehnert, Werner ^{[3
,4
]}

Manke, Ingo ^{[5
]}

Bazylak, Aimy ^{[1
]}

机构：

[1] Univ Toronto, Fac Appl Sci & Engn, Dept Mech & Ind Engn, TEAM Lab,Inst Sustainable Energy, Toronto, ON M5S 3G8, Canada

[2] Univ Potsdam, D-14476 Potsdam, Germany

[3] Helmholtz Ctr Berlin Mat & Energy GmbH, Hahn Meitner Pl 1, D-14109 Berlin, Germany

[4] Forschungszentrum Julich GmbH, Inst Energy & Climate Res, Electrochem Proc Engn, D-52425 Julich, Germany

[5] Rhein Westfal TH Aachen, Fac Mech Engn, D-52056 Aachen, Germany

来源：

JOURNAL OF POWER SOURCES | 2016年 / 335卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Pore network modeling; Synchrotron X-ray; Computed tomography; Liquid water distribution; Gas diffusion layer; Compression; LIQUID WATER TRANSPORT; EFFECTIVE THERMAL-CONDUCTIVITY; PLANE POROSITY DISTRIBUTIONS; MICRO-POROUS LAYER; MICROPOROUS LAYER; 2-PHASE FLOW; PEMFC GDLS; MICROSTRUCTURE; RESISTANCE; BEHAVIOR;

D O I：

10.1016/j.jpowsour.2016.10.039

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：

Understanding how compression affects the distribution of liquid water and gaseous oxygen in the polymer electrolyte membrane fuel cell gas diffusion layer (GDL) is vital for informing the design of improved porous materials for effective water management strategies. Pore networks extracted from synchrotron-based micro-computed tomography images of compressed GDLs were employed to simulate liquid water transport in GDL materials over a range of compression pressures. The oxygen transport resistance was predicted for each sample under dry and partially saturated conditions. A favorable GDL compression value for a preferred liquid water distribution and oxygen diffusion was found for Toray TGP-H-090 (10%), yet an optimum compression value was not recognized for SGL Sigracet 25BC. SGL Sigracet 25BC exhibited lower transport resistance values compared to Toray TGP-H-090, and this is attributed to the additional diffusion pathways provided by the microporous layer (MPL), an effect that is particularly significant under partially saturated conditions. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：162 / 171

页数：10

共 63 条

[1] Balancing mass transport resistance and membrane resistance when tailoring microporous layer thickness for polymer electrolyte membrane fuel cells operating at high current densities [J].