Analysis of transient response of a unit proton-exchange membrane fuel cell with a degraded gas diffusion layer

被引：47

作者：

Cho, Junhyun ^{[1
]}

Ha, Taehun ^{[1
]}

Park, Jaeman ^{[1
]}

Kim, Han-Sang ^{[2
]}

Min, Kyoungdoug ^{[1
]}

Lee, Eunsook ^{[3
]}

Jyoung, Jy-Young ^{[3
]}

机构：

[1] Seoul Natl Univ, Sch Mech & Aerosp Engn, Seoul 151744, South Korea

[2] Seoul Natl Univ Sci & Technol, Dept Automot Engn, Seoul 139743, South Korea

[3] Hyupjin I&C, Hwasung Si 455963, Gyeonggi Do, South Korea

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 10期

关键词：

Proton-exchange membrane fuel cell; Transient response; Dynamic behavior; Gas diffusion layer; Durability; Hydrophobicity; FLOW-FIELD DESIGN; ELECTROLYTE MEMBRANE; DYNAMIC-BEHAVIOR; OPERATING-CONDITIONS; STEADY-STATE; PERFORMANCE; DURABILITY; DEGRADATION; TRANSPORT; 2-PHASE;

D O I：

10.1016/j.ijhydene.2011.02.060

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 transient response characteristics and durability problems of proton-exchange membrane fuel cells are important issues for the application of PEM fuel cells to automotive systems. The gas diffusion layer is the key component of the fuel cell because it directly influences the mass transport mechanism. In this study, the effects of GDL degradation on the transient response of the PEM fuel cell are systematically studied using transient response analysis under different stoichiometric ratios and humidity conditions. With GDLs aged by the accelerated stress test, the effects of hydrophobicity and structural changes due to carbon loss in the GDL on the transient response of PEM fuel cells are determined. The cell voltage is measured according to the sudden current density change. The degraded GDLs that had uneven hydrophobicity distributions cause local water flooding inside the GDL and induce lower and unstable voltage responses after load changes. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：6090 / 6098

页数：9