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Two-dimensional computational fluid dynamics analysis of transport limitations of different electrolyte systems in a lithium-air button cell cathode

  • One of the practical bottlenecks associated with commercialization of lithium-air cells is the choice of an appropriate electrolyte that provides the required combination of cell performance, cyclability and safety. With the help of a two-dimensional multiphysics model, we attempt to narrow down the electrolyte choice by providing insights into the effect of the transport properties ofOne of the practical bottlenecks associated with commercialization of lithium-air cells is the choice of an appropriate electrolyte that provides the required combination of cell performance, cyclability and safety. With the help of a two-dimensional multiphysics model, we attempt to narrow down the electrolyte choice by providing insights into the effect of the transport properties of electrolyte, electrode saturation (flooded versus gas diffusion), and electrode thickness on a single discharge performance of a lithium-air button cell cathode for five different electrolytes including water, ionic liquid, carbonate, ether, and sulfoxide. The 2D distribution of local current density and concentrations of electrochemically active species (O2 and Li+) in the cathode is also discussed w.r.t electrode saturation. Furthermore, the efficacy of species transport in the cathode is quantified by introducing two parameters, firstly, a transport efficiency that gives local insight into the distribution of mass transfer losses, and secondly, an active electrode volume that gives global insight into the cathode volume utilization at different current densities. A detailed discussion is presented toward understanding the design-induced performance limitations in a Li-air button cell prototype.show moreshow less

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Metadaten
Document Type:Article (reviewed)
Zitierlink: https://opus.hs-offenburg.de/2639
Bibliografische Angaben
Title (English):Two-dimensional computational fluid dynamics analysis of transport limitations of different electrolyte systems in a lithium-air button cell cathode
Author:Manik MayurStaff MemberORCiD, Wolfgang G. BesslerStaff MemberORCiDGND
Year of Publication:2017
Publisher:The Electrochemical Society
First Page:E3489
Last Page:E3498
Parent Title (English):Journal of the Electrochemical Society
Volume:164
Issue:11
ISSN:0013-4651
DOI:https://doi.org/10.1149/2.0451711jes
Language:English
Inhaltliche Informationen
Institutes:Forschung / INES - Institut für nachhaltige Energiesysteme (bis 18.11.2021: Institut für Energiesystemtechnik)
Fakultät Maschinenbau und Verfahrenstechnik (M+V)
Institutes:Bibliografie
Tag:2D axi-symmetric; Battery; Button cell; Lithium-air; Modeling
Formale Angaben
Open Access: Open Access 
Licence (German):License LogoUrheberrechtlich geschützt