Fronczek, David Norman and Bessler, Wolfgang Georg (2012) Insight Into Li/S Batteries: Elementary Kinetic Modeling and Impedance Simulation. 16th International Meeting on Lithium Batteries, 2012-06-17 - 2012-06-22, ICC Jeju, South Korea.
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Abstract
The lithium-sulfur (Li/S) battery is one of the most promising systems for portable electrochemical energy storage [1]. The complex redox chemistry of sulfur, the large number of soluble intermediates and the dissolution and precipitation of solids, however, present a major challenge to understanding Li/S electrochemistry. We present the first model of the Li/S cell based on a fully elementary reaction mechanism, building on the work of Kumaresan et al. [2]. A detailed model of the evolution of solid phases as well as multi-component (Li+, PF6–, S8, S82−, S62−, S42−, S22−, S2−) mass and charge transport are included, allowing for the simulation of discharge and charge curves, electro- chemical impedance spectra [3], and concentration profiles. The results confirm that the discharge behavior of the Li/S cell is governed by the presence of solid reactant and product phases in exchange with the dis- solved sulfur poly-anions. The first and second discharge stages are characterized by the presence of solid S8 and Li2S, respectively, while the inter- mediate dip corresponds to a situation where all chemical compounds are dissolved in the electrolyte. Simulated electrochemical impedance spectra are used to validate the model against experimental data. References [1] B. Scrosati, J. Garche, J. Power Sources, 195 (2010), 2419–2430. [2] K. Kumaresan, Y. Mikhaylik and R.E. White, J. Electrochem. Soc., 155 (2008), A576–A582 [3] W.G. Bessler, J. Electrochem. Soc. 154, B1186–B1191 (2007).
Item URL in elib: | https://elib.dlr.de/76183/ | ||||||||||||
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Document Type: | Conference or Workshop Item (Poster) | ||||||||||||
Title: | Insight Into Li/S Batteries: Elementary Kinetic Modeling and Impedance Simulation | ||||||||||||
Authors: |
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Date: | 18 June 2012 | ||||||||||||
Refereed publication: | No | ||||||||||||
Open Access: | Yes | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | No | ||||||||||||
In ISI Web of Science: | No | ||||||||||||
Series Name: | International Meeting on Lithium Batteries | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | Modellierung; modeling; lithium-sulfur battery; Lithium-Schwefel Batterie; DENIS | ||||||||||||
Event Title: | 16th International Meeting on Lithium Batteries | ||||||||||||
Event Location: | ICC Jeju, South Korea | ||||||||||||
Event Type: | international Conference | ||||||||||||
Event Start Date: | 17 June 2012 | ||||||||||||
Event End Date: | 22 June 2012 | ||||||||||||
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: | Fronczek, David N. | ||||||||||||
Deposited On: | 17 Jul 2012 09:32 | ||||||||||||
Last Modified: | 24 Apr 2024 19:42 |
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