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Time Resolved Measurements of Proton Conductivity of Nafion: an Incentive for Theoretical Modelling

Hink, S. and Bessler, Wolfgang G. and Roduner, E. (2011) Time Resolved Measurements of Proton Conductivity of Nafion: an Incentive for Theoretical Modelling. In: Book of Abstracts, pp. 57-58. 8th Symposium on Fuel Cell Modeling and Experimental Validation, 8-9 March, 2011, Bonn, Germany.

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Official URL: https://www.congressa.de/ModVal8/files/modval8-abook-corr_20110304.pdf

Abstract

Electrochemical atomic force microscopy allows spatially resolved measurements of proton conductivity of proton exchange membranes on a nanoscale [1]. A potential step perturbation is applied to the electrochemical cell which consists of a platinum layer (typically acting as anode) on a commercially available Nafion 212 membrane and the platinum coated tip of the atomic force microscope in an environmental chamber. Depending on the gas composition, different electrochemical reactions can be investigated. In the case of using hydrogen the potential step leads to proton formation at the anode and backformation of hydrogen at the cathode. The dynamic information of the system is included in the response current and the related voltage-time signal. A Fourier Transformation converts the data to the frequency domain and the impedance can be calculated [2]. In principle, this technique provides the same information as electrochemical impedance spectroscopy, but due to the spatial resolution of a few nanometers a detailed view of proton conductivity within a proton exchange membrane is accessible. The results and their comparison with simulations may be used to develop a much more sophisticated model of a proton exchange membrane fuel cell.

Item URL in elib:https://elib.dlr.de/72771/
Document Type:Conference or Workshop Item (Poster)
Title:Time Resolved Measurements of Proton Conductivity of Nafion: an Incentive for Theoretical Modelling
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hink, S.UNSPECIFIEDUNSPECIFIED
Bessler, Wolfgang G.Wolfgang.Bessler (at) dlr.deUNSPECIFIED
Roduner, E.UNSPECIFIEDUNSPECIFIED
Date:8 March 2011
Journal or Publication Title:Book of Abstracts
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 57-58
Editors:
EditorsEmail
Lehnert, W.UNSPECIFIED
Reimer, U.UNSPECIFIED
Kulikovsky, A.UNSPECIFIED
Status:Published
Keywords:Nafion, Modeling, Proton Conductivity
Event Title:8th Symposium on Fuel Cell Modeling and Experimental Validation
Event Location:Bonn, Germany
Event Type:international Conference
Event Dates:8-9 March, 2011
Organizer:Forschungszentrum Jülich GmbH
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E EV - Energy process technology (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: Yurkiv, Vitaliy
Deposited On:12 Dec 2011 16:51
Last Modified:31 Jul 2019 19:34

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