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Reaction and transport in Ag/Ag2O gas diffusion electrodes of aqueous Li-O2 batteries: Experiments and modeling

Danner, Timo and Horstmann, Birger and Wittmaier, Dennis and Wagner, Norbert and Bessler, Wolfgang (2014) Reaction and transport in Ag/Ag2O gas diffusion electrodes of aqueous Li-O2 batteries: Experiments and modeling. Journal of Power Sources, 264, pp. 320-332. Elsevier. DOI: http://dx.doi.org/10.1016/j.jpowsour.2014.03.149 ISSN 0378-7753

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Abstract

Aqueous lithiumeoxygen batteries are promising candidates for electric energy storage. In this paper we present and discuss a multiphase continuum model of an aqueous lithiumeoxygen single cell including reactions and transport in a porous gas diffusion electrode (GDE). The model is parameterized using inhouse half-cell experiments and available literature data on aqueous electrolytes. We validate our transport model with cyclic voltammetry and electrochemical impedance spectroscopy measurements over a wide range of temperatures (25, 40, 55 �C) and electrolyte concentrations (0.1 - 2 M). We observe very good agreement between simulations and measurements during oxygen reduction conditions. A sensitivity analysis of the validated model demonstrates the influence of the porous structure on GDE performance and gives directions for the future development of electrodes.

Item URL in elib:https://elib.dlr.de/91891/
Document Type:Article
Title:Reaction and transport in Ag/Ag2O gas diffusion electrodes of aqueous Li-O2 batteries: Experiments and modeling
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Danner, Timotimo.danner (at) dlr.deUNSPECIFIED
Horstmann, Birgerbirger.horstmann (at) dlr.deUNSPECIFIED
Wittmaier, Dennisdennis.wittmaier (at) dlr.deUNSPECIFIED
Wagner, Norbertnorbert.wagner (at) dlr.deUNSPECIFIED
Bessler, Wolfgangwolfgang.bessler (at) hs-offenburg.deUNSPECIFIED
Date:26 April 2014
Journal or Publication Title:Journal of Power Sources
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:264
DOI :http://dx.doi.org/10.1016/j.jpowsour.2014.03.149
Page Range:pp. 320-332
Editors:
EditorsEmail
Passerini, Stefanostefano.passerini@kit.edu
Publisher:Elsevier
ISSN:0378-7753
Status:Published
Keywords:Lithium-oxygen (Li-O2) Aqueous electrolyte (LiOH) Half-cell experiments Modeling and simulation Electrode design
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:other (old)
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies
DLR - Research theme (Project):E - Materials for Energy Technology (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Danner, Timo
Deposited On:17 Nov 2014 16:23
Last Modified:17 Nov 2014 16:23

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