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Microscopic Analysis of Current and Mechanical Properties of Nafion® Studied by Atomic Force Microscopy

Hiesgen , Renate and Helmly, Stephan and Galm, Ines and Morawietz, Tobias and Handl, Michael and Friedrich, K. Andreas (2012) Microscopic Analysis of Current and Mechanical Properties of Nafion® Studied by Atomic Force Microscopy. Membranes (2), pp. 783-803. Multidisciplinary Digital Publishing Institute (MDPI). ISBN 10.3390/membranes2040783 ISSN 2077-0375

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Official URL: http://www.mdpi.com/journal/membranes

Abstract

The conductivity of fuel cell membranes as well as their mechanical propertiesat the nanometer scale were characterized using advanced tapping mode atomic force microscopy (AFM) techniques. AFM produces high-resolution images under continuous current flow of the conductive structure at the membrane surface and provides some insight into the bulk conducting network in Nafion membranes. The correlation of conductivity with other mechanical properties, such as adhesion force, deformation and stiffness, were simultaneously measured with the current and provided an indication of subsurface phase separations and phase distribution at the surface of the membrane. The distribution of conductive pores at the surface was identified by the formation of water droplets. A comparison of nanostructure models with high-resolution current images is discussed in detail.

Item URL in elib:https://elib.dlr.de/78621/
Document Type:Article
Title:Microscopic Analysis of Current and Mechanical Properties of Nafion® Studied by Atomic Force Microscopy
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hiesgen , RenateHochschule EsslingenUNSPECIFIED
Helmly, Stephanstefan.helmly (at) dlr.deUNSPECIFIED
Galm, InesHochschule EsslingenUNSPECIFIED
Morawietz, TobiasHochschule EsslingenUNSPECIFIED
Handl, Michael Hochschule EsslingenUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Date:16 November 2012
Journal or Publication Title:Membranes
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Page Range:pp. 783-803
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2077-0375
ISBN:10.3390/membranes2040783
Status:Published
Keywords:Nafion; AFM; current; adhesion; stiffness; nanostructure; model
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: Friedrich, Prof.Dr. Kaspar Andreas
Deposited On:19 Nov 2012 15:20
Last Modified:21 Sep 2019 05:05

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