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A combined in-situ and post-mortem investigation on local permanent degradation in a direct methanol fuel cell

Bresciani, Fausto and Rabissi, Claudio and Zago, Matteo and Gazdzicki, Pawel and Schulze, Mathias and Guatez, Laure and Escribano, Silvie and Bonde, Jacob and Marchesi, Renzo and Casalegno, Andrea (2016) A combined in-situ and post-mortem investigation on local permanent degradation in a direct methanol fuel cell. Journal of Power Sources, 306, pp. 49-61. Elsevier. DOI: 10.1016/j.jpowsour.2015.11.105 ISSN 0378-7753

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Official URL: http://www.sciencedirect.com/science/article/pii/S0378775315306030

Abstract

This work proposes a systematic experimental investigation, coupling in-situ diagnostics (electrochemical and mass transport investigation) with ex-situ analyses of pristine, activated and aged components (X-ray photoelectron spectroscopy and transmission electron microscopy), with an in-plane and through-plane local resolution. Such a combined approach allows to identify on one hand the degradation mechanisms, the affected components and the presence of heterogeneities; on the other hand, it allows to quantify the effect of the major mechanisms on performance decay. Thanks to a novel procedure, temporary (0.021 mV/h) and permanent degradation (0.059 mV/h) are separated, distinguishing the latter in different contributions: the effects of active area loss at both at anode (0.009 mV/h) and cathode (0.031 mV/h), mass transport issue (0.015 mV/h) and membrane decay (0.004 mV/h). The post-mortem analysis highlights the effect of degradation mechanisms consistent with the in-situ analysis and reveals the presence of considerable in plane and through plane heterogeneities in: particle size growth in catalyst layers, Pt/Ru and polymer content in catalyst and diffusion layers, Pt/Ru precipitates in the membrane.

Item URL in elib:https://elib.dlr.de/100923/
Document Type:Article
Title:A combined in-situ and post-mortem investigation on local permanent degradation in a direct methanol fuel cell
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bresciani, FaustoPolitecnico di MilanoUNSPECIFIED
Rabissi, ClaudioPolitecnico di MilanoUNSPECIFIED
Zago, MatteoPolitecnico di MilanoUNSPECIFIED
Gazdzicki, Pawelpawel.gazdzicki (at) dlr.deUNSPECIFIED
Schulze, Mathiasmathias.schulze (at) dlr.deUNSPECIFIED
Guatez, LaureCEAUNSPECIFIED
Escribano, SilvieCEAUNSPECIFIED
Bonde, JacobIRD Fuel Cells A/SUNSPECIFIED
Marchesi, RenzoPolitecnico di MilanoUNSPECIFIED
Casalegno, AndreaPolitecnico di MilanoUNSPECIFIED
Date:2016
Journal or Publication Title:Journal of Power Sources
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:306
DOI :10.1016/j.jpowsour.2015.11.105
Page Range:pp. 49-61
Publisher:Elsevier
ISSN:0378-7753
Status:Published
Keywords:Fuel Cell, Degradation, XPS
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 - Electrochemical Processes (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Gazdzicki, Dr. Pawel
Deposited On:01 Feb 2016 11:57
Last Modified:10 May 2016 23:38

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