Bauder, Alexander and Wagner, Norbert and Friedrich, Kaspar Andreas (2009) Investigation of GDL degradation behaviour by half cell tests. Autobrane Final Event, 2009-10-20 - 2009-10-21, 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/ | ||||||||||||||||
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Document Type: | Conference or Workshop Item (Poster) | ||||||||||||||||
Title: | Investigation of GDL degradation behaviour by half cell tests | ||||||||||||||||
Authors: |
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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 Start Date: | 20 October 2009 | ||||||||||||||||
Event End Date: | 21 October 2009 | ||||||||||||||||
HGF - Research field: | Energy | ||||||||||||||||
HGF - Program: | Efficient Energy Conversion (old) | ||||||||||||||||
HGF - Program Themes: | E EV - Energy process technology (old), E BZ - Fuel cells (old) | ||||||||||||||||
DLR - Research area: | Energy | ||||||||||||||||
DLR - Program: | E EV - Energy process technology, 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: | 24 Apr 2024 19:25 |
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