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Modeling Aqueous Zinc-Ion Batteries: The Influence of Electrolyte Speciation on Cell Performance

Herrmann, Niklas and Horstmann, Birger (2021) Modeling Aqueous Zinc-Ion Batteries: The Influence of Electrolyte Speciation on Cell Performance. 120th Bunsen-Tagung, 10.-12. May. 2021, Virtual Event.

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Abstract

Zinc-based batteries are among the longest-used cell systems, yet they show increasing research interest in the last years [1]. The high specific capacity of zinc metal anodes combined with their stability in aqueous electrolytes and abundance highlights their potential in a growing market for energy storage systems. The long-commercialized alkaline cell chemistry, a zinc metal anode and a manganese dioxide cathode, showed increased rechargeability when switching to mildly acidic electrolytes [2]. While the charge transport of Zn2+ is widely acknowledged and distinguishes them from alkaline electrolytes, in-detail charge storage mechanisms are under debate [3]. The electrolyte's role in this process and its influence on cell performance and stability is often overlooked. We employ a thermodynamically consistent dynamic cell model to describe aqueous zinc-ion batteries' behavior in our work. The model includes a thermodynamical equilibrium description of complex formations. Species composition significantly alters the transport properties and stability of both the electrolyte and the cathode. We predict cell behavior and cycling performance for different electrolytes and electrode materials. Putting this into the context of cell parametrization and rate limitations, we describe possible pitfalls and identify goals for the ongoing optimization of zinc-ion batteries.

Item URL in elib:https://elib.dlr.de/147451/
Document Type:Conference or Workshop Item (Poster)
Title:Modeling Aqueous Zinc-Ion Batteries: The Influence of Electrolyte Speciation on Cell Performance
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Herrmann, NiklasNiklas.Borchers (at) dlr.dehttps://orcid.org/0000-0002-9618-3723
Horstmann, Birgerbirger.horstmann (at) dlr.dehttps://orcid.org/0000-0002-1500-0578
Date:2021
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Modeling; Modelling; Battery Modelling; Full-Cell Model; Zinc-Ion Batteries; Electrolyte Speciation
Event Title:120th Bunsen-Tagung
Event Location:Virtual Event
Event Type:national Conference
Event Dates:10.-12. May. 2021
Organizer:Deutsche Bunsen-Gesellschaft für physikalische Chemie
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E VS - Combustion Systems
DLR - Research theme (Project):E - Materials for Electrochemical Energy Storage
Location: Ulm
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Herrmann, Niklas
Deposited On:23 Dec 2021 10:11
Last Modified:23 Dec 2021 10:11

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