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Atomic Force Microscopy Studies of Conductive Nanostructures in Solid Polymer Electrolytes

Hiesgen, Renate and Morawietz, Tobias and Helmly, Stefan and Galm, Ines and Friedrich, K. Andreas (2013) Atomic Force Microscopy Studies of Conductive Nanostructures in Solid Polymer Electrolytes. ECS Transactions, 58 (1), pp. 595-605. Electrochemical Society, Inc.. DOI: 0.1149/05801.0595ecst ISSN 1938-5862

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The morphological and conductive structure of surface and bulk of different ionomer, namely Nafion®, Aquivion®, and JST have been investigated by material-sensitive and conductive tapping mode atomic force microscopy (AFM). The thickness of the non-conducting surface skin layer could be measured directly. The ionic structure at equilibrium was found to be consistent with the 4 nm size of the “ionic peak” in SAXS. At freshly cut cross sections of Nafion® defined ionic regions with low adhesion and a high adhesion phase, interpreted as molecular back-bone, with a high density of steps were detected. A statistical analysis of the step heights delivered a most probable height, consistent with a layer of two polymer back-bones with two side-chains in between, with smaller values for Aquivion®. Platinum deposits visible inside the membrane after operation indicate the existence of two-dimensional aqueous phase and confirm the recently proposed model of flat water sheets.

Item URL in elib:https://elib.dlr.de/85093/
Document Type:Article
Title:Atomic Force Microscopy Studies of Conductive Nanostructures in Solid Polymer Electrolytes
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hiesgen, Renate renate.hiesgen (at) hs-esslingen.deUNSPECIFIED
Morawietz, TobiasHochschule EsslingenUNSPECIFIED
Helmly, Stefan stefan.helmly (at) dlr.deUNSPECIFIED
Galm, Ines ines.galm (at) hs-esslingen.deUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Journal or Publication Title:ECS Transactions
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :0.1149/05801.0595ecst
Page Range:pp. 595-605
Publisher:Electrochemical Society, Inc.
Keywords:Atomic Force Microscopy Microstructure of Polymer membranes conductivity
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:11 Nov 2013 15:00
Last Modified:06 Sep 2019 15:24

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