Influence of local carbon fibre orientation on the water transport in the gas diffusion layer of polymer electrolyte membrane fuel cells

被引：29
|
作者：
Markoetter, Henning [1 ,2 ]
Dittrnann, Katja [2 ]
Haussmann, Jan [3 ]
Alink, Robert [4 ]
Gerteisen, Dietmar [4 ]
Riesemeier, Heinrich [5 ]
Scholta, Joachim [3 ]
Banhart, John [1 ,2 ]
Manke, Ingo [2 ]
机构：
[1] Tech Univ Berlin, D-10623 Berlin, Germany
[2] Helmholtz Zentrum Berlin, D-14109 Berlin, Germany
[3] Zentrum Sonnenenergie & Wasserstoff Forsch Baden, D-89081 Ulm, Germany
[4] Fraunhofer Inst Solare Eneigiesyst ISE, D-79110 Freiburg, Germany
[5] Bundesanstalt Mat Forsch & Prufung BAM, D-12205 Berlin, Germany
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2015年 / 51卷
关键词：
Polymer electrolyte membrane fuel cell; Gas diffusion layer; Perforation; Liquid water transport; Local fibre structure; Radiography combined with tomography; VISUALIZATION; TOMOGRAPHY; SATURATION; BEHAVIOR;
D O I：
10.1016/j.elecom.2014.12.013
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
We used synchrotron X-ray imaging to investigate the influence of local fibre structures of gas diffusion layers (GDLs) in polymer electrolyte membrane fuel cells on the transport of water. Two different measurement techniques, namely in-situ radiography and ex-situ tomography, were combined to reveal the structure-properties relationships between the three-dimensional fibre arrangement and the water flow. We found that the orientation of the local carbon fibres strongly affects the direction of liquid water transport. The carbon fibres act as guiding rails for the water droplets. These findings provide completely new ideas on how gas diffusion media in various types of fuel cells could be designed, in order to optimise transport pathways for liquid water and therefore increase cell performance. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：133 / 136
页数：4
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