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/ | ||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||
Title: | Reaction and transport in Ag/Ag2O gas diffusion electrodes of aqueous Li-O2 batteries: Experiments and modeling | ||||||||||||||||||
Authors: |
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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: |
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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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