Accelerated Degradation of Polymer Electrolyte Membrane Fuel Cell Gas Diffusion Layers: Performance Degradation and Steady State Liquid Water Distributions with in Operando Synchrotron X-ray Radiography

被引：2

作者：

Liu, Hang ^{[1
]}

George, Michael G. ^{[1
]}

Ge, Nan ^{[1
]}

Banerjee, Rupak ^{[1
]}

Chevalier, Stephane ^{[1
]}

Lee, Jongmin ^{[1
]}

Shrestha, Pranay ^{[1
]}

Muirhead, Daniel ^{[1
]}

Hinebaugh, James ^{[1
]}

Zeis, Roswitha ^{[2
]}

Messerschmidt, Matthias ^{[3
]}

Scholta, Joachim ^{[3
]}

Bazylak, Aimy ^{[1
]}

机构：

[1] Univ Toronto, Thermofluids Energy & Adv Mat Lab, Dept Mech & Ind Engn, Inst Sustainable Energy,Fac Appl Sci & Engn, Toronto, ON, Canada

[2] Helmholtz Inst Ulm, Karlsruhe Inst Technol, Ulm, Baden Wurttembe, Germany

[3] Zentrum Sonnenenergie & Wasserstoff Forsch Baden, Ulm, Baden Wurttembe, Germany

来源：

POLYMER ELECTROLYTE FUEL CELLS 16 (PEFC 16) | 2016年 / 75卷 / 14期

基金：

加拿大自然科学与工程研究理事会; 加拿大健康研究院;

关键词：

TRANSPORT;

D O I：

10.1149/07514.0289ecst

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

As-received pristine gas diffusion layers (GDLs) were degraded through an accelerated artificial aging process by immersion into a 35% solution of H2O2 at 90 degrees C for 12 hours. Polarization curves were obtained while synchrotron X-ray radiography was performed to investigate the effect of ageing on liquid water transport behavior. Peak output power density of the fuel cell composed of the aged GDL reached only 76% of that of the fuel cell composed of the pristine GDL. This performance degradation was attributed to an increase in mass transport resistance associated with liquid water accumulation at the aged GDL and flow field channel interface. The aged GDLs showed more liquid water accumulation at the microporous layer (MPL)/carbon substrate interface and carbon substrate regions than pristine GDLs at low current density operation. A fully developed water profile was established at lower current density for the aged GDLs compared to pristine GDLs.

引用

页码：289 / 300

页数：12

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