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A Model-Based Insight into Electrolyte Behaviour in Aqueous Zinc-Ion Batteries

Borchers, Niklas and Horstmann, Birger (2020) A Model-Based Insight into Electrolyte Behaviour in Aqueous Zinc-Ion Batteries. PRiME 2020, 2020-10-04 - 2020-10-09, Online.

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Official URL: https://ecs.confex.com/ecs/prime2020/meetingapp.cgi/Paper/139612


Next-generation batteries strive for the optimal fit in performance, cost, and environmental safety. Within recent times, a whole playground of different material systems and working principles were investigated. Consumer alkaline batteries with a metallic zinc anode and manganese dioxide cathode achieve excellent energy densities, yet their development stalled due to their limited rechargeability. Switching the aqueous electrolyte from alkaline KOH to, for example, mild electrolytes, however, showed a reversible charge/discharge mechanism at the cathode. This achievement highly increased the research interest in zinc-ion batteries in the last decade, and many successful systems were proposed. Aqueous metal batteries face a series of challenges. The limited stability window of water, as well as unwanted precipitation reactions, deteriorate the battery performance and increase aging reactions. The electrolytes composition and the concentration-dependent complex formation governs its performance. Within Zinc-air batteries, we performed model-based optimization studies of pH adjusted electrolytes. Yet, to our knowledge, there is no modelling work done for zinc-ion batteries. Within our contribution, we combine a description of complex formation with a dynamic cell model. The electrolyte speciation significantly influences the transport properties of the electrolyte as well as its stability. With our cell model, we predict the performance and rate-dependent behavior of commonly used materials. With this, we identify system-requirements and pitfalls in the ongoing optimization of aqueous zinc-ion batteries.

Item URL in elib:https://elib.dlr.de/139373/
Document Type:Conference or Workshop Item (Speech)
Title:A Model-Based Insight into Electrolyte Behaviour in Aqueous Zinc-Ion Batteries
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Borchers, NiklasUNSPECIFIEDhttps://orcid.org/0000-0002-9618-3723UNSPECIFIED
Horstmann, BirgerUNSPECIFIEDhttps://orcid.org/0000-0002-1500-0578UNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Zinc-Ion Batteries, Modeling, Aqueous Electrolytes
Event Title:PRiME 2020
Event Location:Online
Event Type:international Conference
Event Start Date:4 October 2020
Event End Date:9 October 2020
Organizer:The Electrochemical Society (ECS), The Electrochemical Society of Japan (ECSJ), and The Korean Electrochemical Society (KECS)
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: Ulm
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Bolay, Linda
Deposited On:11 Dec 2020 16:41
Last Modified:24 Apr 2024 20:40

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