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Thermally Sprayed Low Cost Current Collectors with Optimized Mass Transport Behavior for PEM Electrolyzers

Kolb, Svenja (2017) Thermally Sprayed Low Cost Current Collectors with Optimized Mass Transport Behavior for PEM Electrolyzers. Master's.

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Abstract

The costs of the Proton Exchange Membrane (PEM) electrolyzer system need to be reduced while maintaining high performance. The stack component costs comprise 60% of the total system costs in which the bipolar plates and the current collectors are the main factors. In this thesis the facts that current collectors are produced by Vacuum Plasma Spraying (VPS) are discussed and described and are characterized physically as well as electrochemically. The developed graded structures exhibit improved properties regarding conductivity and water transport. The optimal structures for the layer contacting the electrode have pore diameters between 6 and 17um and porousness between 17 and 30%. X-Ray scanning tomography (performed at the University of Toronto) enables 3D reconstructions of the samples confirming the porosity and pore distribution. Moreover, a model in OpenPNM was used to predict the movement of the gases through the current collectors.

Item URL in elib:https://elib.dlr.de/116400/
Document Type:Thesis (Master's)
Title:Thermally Sprayed Low Cost Current Collectors with Optimized Mass Transport Behavior for PEM Electrolyzers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kolb, SvenjaSvenja.Kolb (at) dlr.dehttps://orcid.org/0000-0002-8537-6589
Date:April 2017
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:PEM-electrolyzer, PEM-electrolysis system, mass transport behavior, Current Collector
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrolysis and Hydrogen
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Elektrochemical Processes (Electrolysis)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Stiber, Svenja
Deposited On:15 Dec 2017 08:38
Last Modified:15 Dec 2017 08:38

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