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Modelling Aqueous Zinc-Ion Batteries with a Novel Multi-Process Description of MnO2-based Cathodes

Herrmann, Niklas und Horstmann, Birger (2022) Modelling Aqueous Zinc-Ion Batteries with a Novel Multi-Process Description of MnO2-based Cathodes. 31st Topical Meeting of the International Society of Electrochemistry, 2022-05-15 - 2022-05-19, Aachen, Germany.

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Kurzfassung

Amid the energy transition, the highly fluctuating supply from renewable energies prevents a rapid shift away from fossil fuels. It increases energy prices, further fuelled by geopolitical instabilities in gas supply. This situation emphasises the urgency of powerful and affordable electrochemical energy storage systems for a successful energy transition. Next-generation storage technologies are in a tight race competing in energy density, environmental safety, and cost per capacity. For several decades, zinc-based anodes have been commercially successful, though no production-ready zinc-insertion cathode exists yet. Manganese dioxide cathodes, widely used in alkaline cells, present a reversible zinc storage capacity in mild aqueous electrolytes. This finding increased the research interest in zinc-ion batteries in the last decade, and many successful systems were proposed. A series of challenges are facing aqueous metal batteries. The limited electrochemical stability of the electrolyte, the dynamic electrolyte composition and sensitivity to variations in local pH heavily influence performance. Additionally, a single redox couple rarely describes the cells cycling behaviour. This contribution presents a thermodynamically consistent dynamic cell model, which considers the electrolyte's complex formation and coupled transport properties. Building on this, we implement a multi-process model for the manganese oxide cathode, reflecting the most reported side reactions in literature, manganese dissolution, and proton co-insertion. We use this to identify experimental characteristics, describe pinholes, and identify optimisation potential for next-generation zinc batteries.

elib-URL des Eintrags:https://elib.dlr.de/190878/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Modelling Aqueous Zinc-Ion Batteries with a Novel Multi-Process Description of MnO2-based Cathodes
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Herrmann, NiklasNiklas.Borchers (at) dlr.dehttps://orcid.org/0000-0002-9618-3723NICHT SPEZIFIZIERT
Horstmann, Birgerbirger.horstmann (at) dlr.dehttps://orcid.org/0000-0002-1500-0578NICHT SPEZIFIZIERT
Datum:2022
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Zinc-Ion Batteries, Aqueous Electrolytes, Electrolyte Complexation, Manganese Dioxide Cathodes, Side-Reactions
Veranstaltungstitel:31st Topical Meeting of the International Society of Electrochemistry
Veranstaltungsort:Aachen, Germany
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:15 Mai 2022
Veranstaltungsende:19 Mai 2022
HGF - Forschungsbereich:Energie
HGF - Programm:Materialien und Technologien für die Energiewende
HGF - Programmthema:Elektrochemische Energiespeicherung
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SP - Energiespeicher
DLR - Teilgebiet (Projekt, Vorhaben):E - Elektrochemische Speicher
Standort: Ulm
Institute & Einrichtungen:Institut für Technische Thermodynamik > Computergestützte Elektrochemie
Hinterlegt von: Herrmann, Niklas
Hinterlegt am:15 Dez 2022 11:05
Letzte Änderung:24 Apr 2024 20:52

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