Visualization of water buildup in the cathode of a transparent PEM fuel cell

被引：553

作者：

Tüber, K ^{[1
]}

Pócza, D ^{[1
]}

Hebling, C ^{[1
]}

机构：

[1] Fraunhofer Inst Solar Energy Syst, D-79110 Freiburg, Germany

来源：

JOURNAL OF POWER SOURCES | 2003年 / 124卷 / 02期

关键词：

PEMFC; two-phase flow; water transport; cathode flooding; diffusion layer; mathematical model;

D O I：

10.1016/S0378-7753(03)00797-3

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：

Two-phase flow and transport of reactants and products in the cathode of a transparent proton exchange membrane fuel cell (PEMFC) are studied experimentally. Images of water formed inside the cathode gas channels are presented to explain the phenomenon of water flooding. Effects of air stoichiometry, temperature, air humidity and different characteristics of diffusion layers are discussed. The influence of hydrophobic and hydrophilic diffusion layers compared to standard carbon papers on water transport is investigated. Mathematical verification of a threshold current density corresponding to first appearance of liquid water at the membrane/cathode interface confirms the experimental results. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：403 / 414

页数：12

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