Inhomogeneous compression of PEMFC gas diffusion layer - Part II. Modeling the effect

被引：120

作者：

Hottinen, Tero ^{[1
]}

Himanen, Olli ^{[1
]}

Karvonen, Suvi ^{[1
]}

Nitta, Iwao ^{[1
]}

机构：

[1] Aalto Univ, Lab Adv Energy Syst, FIN-02150 Espoo, Finland

来源：

JOURNAL OF POWER SOURCES | 2007年 / 171卷 / 01期

基金：

芬兰科学院;

关键词：

PEMFC; modeling; gas diffusion layer; inhomogeneous compression; contact resistance; current density distribution;

D O I：

10.1016/j.jpowsour.2006.10.076

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：

The effect of inhomogeneous compression of GDL on the mass and charge transfer in PEMFC is studied. The model utilizes experimentally evaluated GDL parameters as a function of thickness. The modeling results are compared with a conventional model that excludes the effects. As a result, it is shown that the inhomogencous compression has a significant effect on the current density distribution because of the varying contact resistance between GDL and electrode. This also implies that there are possible hot spots occurring inside the electrode, and thus inhomogeneous compression can have significant effects on the lifetime and local performance of the cell. According to the achieved results, the inhomogeneous compression of GDL cannot be neglected. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：113 / 121

页数：9