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Methodic Aspects of XPS Depth Profiling for Investigations of Fuel Cell Components

Gazdzicki, Pawel and Biswas, Indro and Schulze, Mathias (2014) Methodic Aspects of XPS Depth Profiling for Investigations of Fuel Cell Components. Surface and Interface Analysis. Wiley. DOI: 10.1002/sia.5498 ISSN 0142-2421

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/sia.5498/abstract

Abstract

The focus of this work is to obtain detailed information about the physical composition of the individual fuel cell components in order to optimize them and increase cell durability. An approach for the ex-situ characterization of fuel cell components, such as gas diffusion media or catalyst layers is by using XPS. In this work, we address methodic aspects of depth profiling of direct methanol fuel cell components (microporous layers and catalyst layers) using adhesive tape peel-off with subsequent XPS analysis. By using this approach, we have successfully demonstrated cross-over of Ru ions and possibly Pt ions from the anodic catalyst to the cathodic catalyst layer and even to the microporous layer. Moreover, our experimental results allow determining where the dissolved catalyst ions redeposit within the membrane electrode assembly. Finally, our findings suggest that cross-over of Pt and Ru ions, observed under different operation conditions, are uncoupled.

Item URL in elib:https://elib.dlr.de/88413/
Document Type:Article
Title:Methodic Aspects of XPS Depth Profiling for Investigations of Fuel Cell Components
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gazdzicki, Pawelpawel.gazdzicki (at) dlr.deUNSPECIFIED
Biswas, Indroindro.biswas (at) dlr.deUNSPECIFIED
Schulze, Mathiasmathias.schulze (at) dlr.deUNSPECIFIED
Date:2014
Journal or Publication Title:Surface and Interface Analysis
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1002/sia.5498
Publisher:Wiley
ISSN:0142-2421
Status:Published
Keywords:XPS, fuel cell, degradation, ex-situ characterization, depth profile
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Fuel Cells (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: Gazdzicki, Dr. Pawel
Deposited On:07 Apr 2014 12:01
Last Modified:07 Apr 2014 12:01

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