Direct measurement of lateral current density distribution in a PEM fuel cell with a serpentine flow field

被引:11
作者
Jia, Shan [1 ]
Liu, Hongtan [1 ]
机构
[1] Univ Miami, Clean Energy Res Inst, Coll Engn, Coral Gables, FL 33146 USA
关键词
PEM fuel cell; Lateral current density distribution; Partially-catalyzed MEA; SUBMILLIMETER RESOLUTION; CHANNEL; TRANSPORT; MODEL; PEFCS; LAND;
D O I
10.1016/j.ijhydene.2013.11.014
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
In a proton exchange membrane (PEM) fuel cell, local current density can vary drastically in the lateral direction across the land and channel areas. It is essential to know the lateral current density variations in order to optimize flow field design and fuel cell performance. Thus the objective of this work is to directly measure the lateral current density variations in a PEM fuel cell with a serpentine flow field. Five 1 mm-width partially-catalyzed membrane electrode assemblies (MEA), each corresponding to a different location from the center of the gas channel to the center of the land area are used in the experiments. Current densities for fuel cells with each of the partially-catalyzed MEAs are measured and the results provide the lateral current density distribution. The measurement results show that in the high cell voltage region, local current density is the highest under the center of the land area and decreases toward the center of the channel area; while in the low cell voltage region local current density is the highest under the center of the channel area and decreases toward the center of the land area. Besides, the effects of cathode flow rates on the lateral current density distribution have also been studied. Furthermore, comparisons have also been made by using air and oxygen in the cathode and it is found that when oxygen is used the local current density under the land is significantly enhanced, especially in the low cell voltage region. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:1449 / 1456
页数:8
相关论文
共 16 条
[1]   Three-dimensional computational analysis of transport phenomena in a PEM fuel cell [J].
Berning, T ;
Lu, DM ;
Djilali, N .
JOURNAL OF POWER SOURCES, 2002, 106 (1-2) :284-294
[2]   Measuring the current distribution in PEFCs with sub-millimeter resolution [J].
Freunberger, Stefan A. ;
Reum, Mathias ;
Evertz, Jorg ;
Wokaun, Alexander ;
Buechi, Felix N. .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2006, 153 (11) :A2158-A2165
[3]   Nonlinear orthotropic model of the inhomogeneous assembly compression of PEM fuel cell gas diffusion layers [J].
Garcia-Salaberri, Pablo A. ;
Vera, Marcos ;
Zaera, Ramon .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2011, 36 (18) :11856-11870
[4]   A PEM fuel cell for combined measurement of current and temperature distribution, and flow field flooding [J].
Hakenjos, A ;
Muenter, H ;
Wittstadt, U ;
Hebling, C .
JOURNAL OF POWER SOURCES, 2004, 131 (1-2) :213-216
[5]   Separate in situ measurements of ECA under land and channel in PEM fuel cells [J].
Higier, Andrew ;
Liu, Hongtan .
JOURNAL OF POWER SOURCES, 2012, 215 :11-17
[6]   Direct measurement of current density under the land and channel in a PEM fuel cell with serpentine flow fields [J].
Higier, Andrew ;
Liu, Hongtan .
JOURNAL OF POWER SOURCES, 2009, 193 (02) :639-648
[7]   Experimental and numerical studies of local current mapping on a PEM fuel cell [J].
Hwnag, J. J. ;
Chang, W. R. ;
Peng, R. G. ;
Chen, P. Y. ;
Su, A. .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2008, 33 (20) :5718-5727
[8]   Electron transport in PEFCs [J].
Meng, H ;
Wang, CY .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (03) :A358-A367
[9]   Effect of electrode configuration and electronic conductivity on current density distribution measurements in PEM fuel cells [J].
Natarajan, D ;
Nguyen, TV .
JOURNAL OF POWER SOURCES, 2004, 135 (1-2) :95-109
[10]   A two-dimensional, two-phase, multicomponent, transient model for the cathode of a proton exchange membrane fuel cell using conventional gas distributors [J].
Natarajan, D ;
Nguyen, TV .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2001, 148 (12) :A1324-A1335