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Investigation of GDL degradation behaviour by half cell tests

Bauder, Alexander and Wagner, Norbert and Friedrich, Kaspar Andreas (2009) Investigation of GDL degradation behaviour by half cell tests. Autobrane Final Event, 20.-21. Okt. 2009, Nabern, Germany.

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Abstract

The objective of this work is to investigate the wettability of gas diffusion layers (GDL) by electrochemical tests and to analyse the change of hydrophobicity due to degradation effects. The common GDL consists of conductive, hydrophilic (coal) and non conductive, hydrophobic (PTFE) components. The change of the ratio of conductive to non conductive area, which can be measured by wetting with liquid electrolyte in an electrochemical measurement setup induces a change of the electrochemical double layer capacitance (Fig. 1). Therefore measurements were performed with five different GDLs to determine the double layer capacitances. Four GDL samples were pre-treated by exposure at defined time in an autoclave (Fig. 2) at 130°C in 1 N sulphuric acid to enforce a degradation effect. One untreated GDL sample was used as reference.

Item URL in elib:https://elib.dlr.de/60530/
Document Type:Conference or Workshop Item (Poster)
Title:Investigation of GDL degradation behaviour by half cell tests
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bauder, Alexanderalexander.bauder (at) dlr.deUNSPECIFIED
Wagner, Norbertnorbert.wagner (at) dlr.deUNSPECIFIED
Friedrich, Kaspar Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Date:October 2009
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Keywords:PEFC, GDL, CV, cyclic voltammetry, hydrophobicity, wettability
Event Title:Autobrane Final Event
Event Location:Nabern, Germany
Event Type:Other
Event Dates:20.-21. Okt. 2009
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 - Elektrochemische Prozesse (old), E - Membran-Brennstoffzellen (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Bauder, Alexander
Deposited On:17 Dec 2009 11:06
Last Modified:17 Dec 2009 11:06

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