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Optimization of Magnesium-Sulfur Batteries by Innovative Material Development (MagSiMal)

Häcker, Joachim and Rommel, Tobias and Zhao-Karger, Zhirong and Schwan, Marina and Hahn, Matthias and Kampmann, Felix and Gayretli, Eren and Schlosser, Anja and Nojabaee, Maryam (2022) Optimization of Magnesium-Sulfur Batteries by Innovative Material Development (MagSiMal). 4TH INTERNATIONAL SYMPOSIUM ON MAGNESIUM BATTERIES (MAGBATT IV), 6.-8. September 2022, Ulm, Deutschland.

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Among the numerous post-lithium battery systems, the magnesium-sulfur battery represents a promising candidate due to its high energy density, improved safety and abundance of the applied raw materials. However, despite intensive research and promising achievements in recent years, the Mg-S battery is still in its infancy facing fundamental challenges like the polysulfide shuttle, sluggish kinetics and parasitic anode reaction resulting in detrimental passivation of the magnesium metal surface and consequential low efficiency. To tackle the bottlenecks, different material design approaches were pursued in the framework of the MagSiMal project (funded by BMBF). The retention of sulfur species was intended to be achieved by different cathode preparation routes (mechanical intrusion, melt and gas phase infiltration), tailored cathode structures (additives, aerogels, meso- and microporous carbons) and coated separators. Parasitic reactions on the anode side - namely ongoing reduction of electrolyte and sulfur species - were mitigated by an organic and inorganic artificial SEI and in-situ SEI-forming electrolyte additives. In addition, thin anodes were prepared via sputtering to reduce the magnesium excess and enhance the energy density. Finally, Mg-S pouch cells with enhanced capacity were realized showing the general suitability of the pursued approaches. However, the remaining high overpotentials, severe self-discharge and significant capacity fading query the whole Mg-S concept - thus future research directions, realistic targets and potential applications are critically discussed.

Item URL in elib:https://elib.dlr.de/190185/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Summary/overview of the BMBF-project MagSiMal and its partners.
Title:Optimization of Magnesium-Sulfur Batteries by Innovative Material Development (MagSiMal)
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Häcker, JoachimJoachim.Haecker (at) dlr.dehttps://orcid.org/0000-0003-2031-9898
Rommel, TobiasT.Rommel (at) dlr.dehttps://orcid.org/0000-0001-8945-4444
Zhao-Karger, Zhirongzhirong.zhao-karger (at) kit.eduhttps://orcid.org/0000-0002-7233-9818
Schwan, MarinaMarina.Schwan (at) dlr.deUNSPECIFIED
Hahn, MatthiasMatthias.Hahn (at) el-cell.comUNSPECIFIED
Kampmann, Felixkampmfli (at) schaeffler.comUNSPECIFIED
Gayretli, Ereneren.gayretli (at) isit.fraunhofer.deUNSPECIFIED
Schlosser, Anjaanja.schlosser (at) customcells.deUNSPECIFIED
Nojabaee, MaryamMaryam.Nojabaee (at) dlr.dehttps://orcid.org/0000-0001-5225-3526
Date:7 September 2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Magnesium-Sulfur Battery, Magnesium-Schwefel Batterie, Electrolyte, Coated Separators, Cathode Additives, Aerogels, Operando Analysis, Electrochemical Impedance Spectroscopy, EIS, UVVis Spectroscopy, Polysulfide Shuttle, Artificial Solid Electrolyte Interface, SEI, MagSiMal, BMBF, Project summary
Event Location:Ulm, Deutschland
Event Type:international Conference
Event Dates:6.-8. September 2022
Organizer:Karlsruhe Institut für Technologie (KIT), Post-Lithium Storage Cluster (PoLiS)
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 SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Storage, E - Electrochemical Processes, E - Materials for Electrochemical Energy Storage
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Institute of Engineering Thermodynamics > Computational Electrochemistry
Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Häcker, Joachim
Deposited On:18 Nov 2022 12:42
Last Modified:12 Dec 2022 18:20

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