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Analysis of Aged Polymer Electrolyte Fuel Cell (PEFC) Components by Non Traditional Methods

Hiesgen, Renate and Wehl, Ines and Helmly, Stefan and Friedrich, K. Andreas and Schulze, Mathias and Haug, Andrea and Yuan, Xiao-Zi and Wang, Haijiang (2011) Analysis of Aged Polymer Electrolyte Fuel Cell (PEFC) Components by Non Traditional Methods. ECS Transactions, 35 (34), pp. 259-269. Electrochemical Society, Inc.. DOI: 10.1149/1.3654224

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The ageing of microporous layers (MPL) of fuel cell gas diffusion layers has been quantitavely analyzed using a special atomic force microscopy technique, namely the so-called HarmoniX technique. From the change of mean adhesion force under dry and wet conditions an increased loss of polytetrafluoroethylene (PTFE) at the cathode was found. With ionic current measurement in tapping and contact mode by AFM, activated Nafion was investigated before fuel cell operation with high resolution and individual ionic channels were imaged in one cluster. These measurements were compared to the current distribution of membranes after 1600 h of fuel cell operation under OCV. Distinct current levels were found which demonstrate the existence of an interpenetrating ionic network with different branches not directly connected at the surface. SEM/EDX investigations of the specially designed fuel cells indicate an important role of platinum in degradation of membranes.

Item URL in elib:https://elib.dlr.de/71418/
Document Type:Article
Title:Analysis of Aged Polymer Electrolyte Fuel Cell (PEFC) Components by Non Traditional Methods
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hiesgen, Renaterenate.hiesgen (at) hs-esslingen.deUNSPECIFIED
Wehl, Inesines.wehl (at) hs-esslingen.deUNSPECIFIED
Helmly, Stefanstefan.helmly (at) dlr.deUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Schulze, Mathiasmathias.schulze (at) dlr.deUNSPECIFIED
Haug, Andrea andrea.haug (at) dlr.deUNSPECIFIED
Yuan, Xiao-ZiNational Research CouncilUNSPECIFIED
Wang, HaijiangNational Research Council CanadaUNSPECIFIED
Date:October 2011
Journal or Publication Title:ECS Transactions
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1149/1.3654224
Page Range:pp. 259-269
Publisher:Electrochemical Society, Inc.
Keywords:polymer fuel cells; degradation of components
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E EV - Energy process technology (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Elektrochemische Prozesse (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Friedrich, Prof.Dr. Kaspar Andreas
Deposited On:08 Nov 2011 11:02
Last Modified:06 Sep 2019 15:24

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