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Modeling nucleation and growth of zinc oxide during discharge of primary zinc-air batteries

Stamm, Johannes and Varzi, Alberto and Latz, Arnulf and Horstmann, Birger (2017) Modeling nucleation and growth of zinc oxide during discharge of primary zinc-air batteries. Journal of Power Sources. Elsevier. doi: 10.1016/j.jpowsour.2017.05.073. ISSN 0378-7753.

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Metal-air batteries are among the most promising next-generation energy storage devices. Relying on abundant materials and offering high energy densities, potential applications lie in the fields of electro-mobility, portable electronics, and stationary grid applications. Now, research on secondary zinc-air batteries is revived, which are commercialized as primary hearing aid batteries. One of the main obstacles for making zinc-air batteries rechargeable is their poor lifetime due to the degradation of alkaline electrolyte in contact with atmospheric carbon dioxide. In this article, we present a continuum theory of a commercial Varta PowerOne button cell. Our model contains dissolution of zinc and nucleation and growth of zinc oxide in the anode, thermodynamically consistent electrolyte transport in porous media, and multi-phase coexistance in the gas diffusion electrode. We perform electrochemical measurements and validate our model. Excellent agreement between theory and experiment is found and novel insights into the role of zinc oxide nucleation and growth and carbon dioxide dissolution for discharge and lifetime is presented. We demonstrate the implications of our work for the development of rechargeable zinc-air batteries.

Item URL in elib:https://elib.dlr.de/116998/
Document Type:Article
Title:Modeling nucleation and growth of zinc oxide during discharge of primary zinc-air batteries
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Stamm, JohannesUniversität MünsterUNSPECIFIED
Varzi, AlbertoKarlsruhe Institut für TechnologieUNSPECIFIED
Latz, Arnulfarnulf.latz (at) dlr.deUNSPECIFIED
Horstmann, Birgerbirger.horstmann (at) dlr.deUNSPECIFIED
Date:9 June 2017
Journal or Publication Title:Journal of Power Sources
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.jpowsour.2017.05.073
Keywords:Aqueous alkaline electrolyte; Carbon dioxide absorption; Model and validation; Nucleation and growth; Primary button cell; Zinc-air battery
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Prcesses (Batteries) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Horstmann, Birger
Deposited On:20 Dec 2017 16:54
Last Modified:20 Jun 2021 15:50

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