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Modelling and Simulation of Zinc-Air Batteries with Aqueous Electrolytes

Clark, Simon and Horstmann, Birger and Latz, Arnulf (2016) Modelling and Simulation of Zinc-Air Batteries with Aqueous Electrolytes. MODVAL 13, 22.-23. März 2016, Lausanne, Schweiz. (Unpublished)

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Abstract

Primary zinc-air batteries have long been an industry standard for low-power applications like hearing aids. Their high theoretical specific energy (1086 Wh ∙ kg-1), use of cheap and non-hazardous materials, and superior operational safety make secondary zinc-air batteries desirable for emerging markets such as electric vehicles or grid storage. But effects including poor cycling stability of the anode, carbonate formation in the alkaline electrolyte, and the lack of a suitable bi-functional air catalyst have limited their use. The Horizon 2020 project Zinc Air Secondary (ZAS!) aims to develop a high-performance rechargeable zinc-air battery capable of achieving more than 1000 cycles. Modelling and simulation of novel cell materials and architectures provides crucial support towards achieving this goal. We have developed a 1D finite volume continuum model implemented in MATLAB. Our model includes a thermodynamically consistent description of mass transport in concentrated ternary electrolytes, multi-phase coexistence in porous media, and reaction kinetics with considerations for anode passivation due to types I and II ZnO, among other effects. Within this framework, we simulate cell performance and lifetime considering various material com-positions and cell architectures. Initial results show that inhomogeneous Zn dissolution and ZnO precipitation in 32 wt% KOH may lead to significant mass transport limitations, particularly at higher current densi-ties. Furthermore, under certain operating conditions type II ZnO may form on the zinc elec-trode surface, permanently shutting down the cell. To address these issues and improve overall performance the effects

Item URL in elib:https://elib.dlr.de/109303/
Document Type:Conference or Workshop Item (Poster)
Title:Modelling and Simulation of Zinc-Air Batteries with Aqueous Electrolytes
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Clark, Simonsimon.clark (at) dlr.deUNSPECIFIED
Horstmann, Birgerbirger.horstmann (at) dlr.deUNSPECIFIED
Latz, Arnulfarnulf.latz (at) dlr.deUNSPECIFIED
Date:2016
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Unpublished
Keywords:Zinc-Air Battery, Modeling, Simulation, Energy Storage
Event Title:MODVAL 13
Event Location:Lausanne, Schweiz
Event Type:international Conference
Event Dates:22.-23. März 2016
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Electrochemical Processes (Batteries) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Clark, Joseph Simon
Deposited On:13 Dec 2016 08:58
Last Modified:31 Jul 2019 20:06

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