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Investigation of Modell Electrodes with Different Catalysts and Ionomer Content of Polymer Fuel Cells by Electrochemical Impedance Spectroscopy

Bauder, Alexander and Wagner, Norbert and Kaz, Till and Friedrich, K. Andreas (2008) Investigation of Modell Electrodes with Different Catalysts and Ionomer Content of Polymer Fuel Cells by Electrochemical Impedance Spectroscopy. In: Conference Proceedings. First CARISMA International Conference - Progress in MEA Components for Medium and High Temperature Polymer Electrolyte Fuel Cells, 2008-09-21 - 2008-09-24, La Grande Motte, France.

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Abstract

To increase the performance and the long term stability of Membrane Electrode Assemblies (MEA) it is necessary to investigate the electrode structure. Therefore model electrodes with different type of catalysts with varying amount of ionomer where prepared and characterized. As electrode materials, supported and unsupported platinum catalysts and as ionomer Nafion in powder form were used. The electrodes were applied on both sides of Nafion 1135 membranes. The most common method to characterize the electrochemical performance of a fuel cell is recording of current/voltage U(i) curves. However, separation of electrochemical and ohmic contributions to the U(i) characteristics requires additional experimental techniques. In this regard electrochemical impedance spectra were measured in addition to U(i) curves to characterize the different model electrodes.

Item URL in elib:https://elib.dlr.de/55903/
Document Type:Conference or Workshop Item (Poster)
Title:Investigation of Modell Electrodes with Different Catalysts and Ionomer Content of Polymer Fuel Cells by Electrochemical Impedance Spectroscopy
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bauder, AlexanderUNSPECIFIEDUNSPECIFIED
Wagner, NorbertUNSPECIFIEDUNSPECIFIED
Kaz, TillUNSPECIFIEDUNSPECIFIED
Friedrich, K. AndreasUNSPECIFIEDUNSPECIFIED
Date:September 2008
Journal or Publication Title:Conference Proceedings
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:PEFC, Ionomer, EIS
Event Title:First CARISMA International Conference - Progress in MEA Components for Medium and High Temperature Polymer Electrolyte Fuel Cells
Event Location:La Grande Motte, France
Event Type:international Conference
Event Dates:2008-09-21 - 2008-09-24
Organizer:carisma-network
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E BZ - Fuel cells (old)
DLR - Research area:Energy
DLR - Program:E BZ - Fuel cells
DLR - Research theme (Project):E - Membran-Brennstoffzellen (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Bauder, Alexander
Deposited On:04 Nov 2008
Last Modified:27 Apr 2009 15:24

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