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Quantitative in Situ Analysis of Ionomer Structure in Fuel Cell Catalytic Layers

Morawietz, Tobias and Handl, Michael and Oldani, Claudio and Friedrich, Kaspar Andreas and Hiesgen, Renate (2016) Quantitative in Situ Analysis of Ionomer Structure in Fuel Cell Catalytic Layers. ACS Applied Materials and Interfaces, 8, pp. 27044-27054. American Chemical society (ACS). DOI: [10.1021/acsami.6b07188] ISBN 1944-8244 ISSN 1944-8244

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Official URL: http://pubs.acs.org/journal/aamick

Abstract

A quantitative in situ investigation of the structure of the catalytic layer of polymer electrolyte membrane fuel cells using material-sensitive and conductive atomic force microscopy is reported. The distribution and size of the ionomer phase at the surface of the catalytic layer is retrieved from adhesion force mappings, measured at high humidity and up to 75 °C. The average ionomer layer thickness varies between 7 and 13 nm for three differently prepared samples, as concluded from the histograms. Evidence of a lamellar structure of the thinner ionomer layers is presented. A significant thinning of the ionomer layers after long-term fuel cell operation is observed.

Item URL in elib:https://elib.dlr.de/109369/
Document Type:Article
Title:Quantitative in Situ Analysis of Ionomer Structure in Fuel Cell Catalytic Layers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Morawietz, TobiasHochschule EsslingenUNSPECIFIED
Handl, MichaelHochschule EsslingenUNSPECIFIED
Oldani, ClaudioSolvay Specialty PolymersUNSPECIFIED
Friedrich, Kaspar AndreasAndreas.Friedrich (at) dlr.deUNSPECIFIED
Hiesgen, Renaterenate.hiesgen (at) hs-esslingen.deUNSPECIFIED
Date:2016
Journal or Publication Title:ACS Applied Materials and Interfaces
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:8
DOI :[10.1021/acsami.6b07188]
Page Range:pp. 27044-27054
Publisher:American Chemical society (ACS)
ISSN:1944-8244
ISBN:1944-8244
Status:Published
Keywords:AFM, fuel cells, electrodes, ionomer layers, degradation
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Fuel cells
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Electrochemical Processes (Fuel Cells) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Friedrich, Prof.Dr. Kaspar Andreas
Deposited On:15 Dec 2016 14:48
Last Modified:15 Dec 2016 14:48

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