elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Simulating the polysulfide shuttle effect: a thermodynamically consistent, fully reversible, numerical Li/S-battery model

Hofmann, Andreas F. and Latz, Arnulf and Fronczek, David Norman and Bessler, Wolfgang G. (2013) Simulating the polysulfide shuttle effect: a thermodynamically consistent, fully reversible, numerical Li/S-battery model. In: 2nd International Conference on Materials for Energy. 2nd International Conference on Materials for Energy - EnMat II, May 12-16, 2013, Karlsruhe, Germany.

[img] PDF (slides of oral presentation) - Registered users only
3MB

Abstract

Lithium-Sulfur (Li/S) cells are promising candidates for a next generation of safe and cost-effective high energy density batteries for mobile and stationary applications. At present, Li/S cells still suffer from poor cycleability, capacity loss under high current densities and self-discharge. Furthermore, the underlying chemical mechanisms of the general discharge/charge behavior as well as Li/S-specific phenomena like the (polysulfide) shuttle are not yet fully understood. Here we present a thermodynamically consistent and fully reversible continuum model of a Li/S cell with simplified four-step electrochemistry, based on a multi-phase modeling framework [1]. The model reproduces experimentally obtained discharge curves from literature [2] at various current densities with fairly high accuracy. While being instructively simple, the presented model can still reproduce distinct Li/S-cell features like seemingly infinite charging at low charge current-densities (shuttle effect), voltage spikes before the plateau-phases of the charging process, as well as voltage drops and capacity loss due to cycling. This not only fosters understanding of possible mechanisms for the shuttle effect, but also makes the presented model a suitable tool for investigation and interpretation of Li/S cell experimental data and a powerful base model for further, more complex model studies focusing on specific details of Li/S cells.

Item URL in elib:https://elib.dlr.de/83577/
Document Type:Conference or Workshop Item (Speech)
Title:Simulating the polysulfide shuttle effect: a thermodynamically consistent, fully reversible, numerical Li/S-battery model
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hofmann, Andreas F.andreas.hofmann (at) dlr.deUNSPECIFIED
Latz, Arnulfarnulf.latz (at) dlr.deUNSPECIFIED
Fronczek, David Normandavid.fronczek (at) dlr.deUNSPECIFIED
Bessler, Wolfgang G.wolfgang.bessler (at) dlr.deUNSPECIFIED
Date:13 May 2013
Journal or Publication Title:2nd International Conference on Materials for Energy
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:lithium-sulfur battery; beyond lithium-ion battery; 2nd generation of lithium batteries
Event Title:2nd International Conference on Materials for Energy - EnMat II
Event Location:Karlsruhe, Germany
Event Type:international Conference
Event Dates:May 12-16, 2013
Organizer:Dechema, e.V.
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: other
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Hofmann, Andreas Felix
Deposited On:12 Aug 2013 14:10
Last Modified:12 Aug 2013 14:10

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.