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Title:A Mechanistic Study of Magnesium Sulfur Batteries
Authors:ID Robba, Ana, Kemijski Inštitut Ljubljana (Author)
ID Vižintin, Alen, Kemijski Inštitut Ljubljana (Author)
ID Bitenc, Jan, Kemijski Inštitut Ljubljana (Author)
ID Mali, Gregor, Kemijski Inštitut Ljubljana (Author)
ID Arčon, Iztok, Univerza v Novi Gorici (Author)
ID Kavčič, Matjaž, Inštitut Jožef Stefan (Author)
ID Žitnik, Matjaž, Inštitut Jožef Stefan (Author)
ID Bučar, Klemen, Inštitut Jožef Stefan (Author)
ID Aquilanti, Giuliana, ELETTRA, Trieste, IT (Author)
ID Martineau-Corcos, Charlotte, Université de Versailles Saint-Quentin-en-Yvelines, France (Author)
ID Randon-Vitanova, Anna, HONDA R&D Europe (Deutschland) GmbH, Germany (Author)
ID Dominko, Robert, Kemijski Inštitut Ljubljana (Author)
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Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:Magnesium sulfur batteries are considered as attractive energy storage devices due to the abundance of electrochemically active materials and high theoretical energy density. Here we report the mechanism of a Mg-S battery operation, which was studied in the presence of simple and commercially available salts dissolved in a mixture of glymes. The electrolyte offers high sulfur conversion into MgS in the first discharge with low polarization. The electrochemical conversion of sulfur with magnesium proceeds through two well-defined plateaus, which correspond to the equilibrium between sulfur and polysulfides (high-voltage plateau) and polysulfides and MgS (low-voltage plateau). As shown by XANES, RIXS and NMR studies, the end discharge phase involves MgS with Mg atoms in a tetrahedral environment resembling the wurtzite structure, while chemically synthesized MgS crystalizes in the rock-salt structure with octahedral coordination of magnesium.
Keywords:magnesium, sulfur, rechargeable batteries, XAS, NMR
Publication version:Version of Record
Year of publishing:2017
Number of pages:29
PID:20.500.12556/RUNG-3323-e7676581-8da3-01c3-1fa8-35a5f086f47e New window
COBISS.SI-ID:4933883 New window
DOI:10.1021/acs.chemmater.7b03956 New window
Publication date in RUNG:19.10.2017
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Record is a part of a journal

Title:Chemistry of Materials
Shortened title:Chem. Mat.
Year of publishing:2017

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:P1-0112
Acronym:Raziskave atomov, molekul in struktur s foton


License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:19.10.2017