Title: | A Mechanistic Study of Magnesium Sulfur Batteries |
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Authors: | Robba, Ana (Author) Vižintin, Alen (Author) Bitenc, Jan (Author) Mali, Gregor (Author) Arčon, Iztok (Author) Kavčič, Matjaž (Author) Žitnik, Matjaž (Author) Bučar, Klemen (Author) Aquilanti, Giuliana (Author) Martineau-Corcos, Charlotte (Author) Randon-Vitanova, Anna (Author) Dominko, Robert (Author) |
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Files: | This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS.  |
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Language: | English |
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Work type: | Not categorized (r6) |
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Tipology: | 1.01 - Original Scientific Article |
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Organization: | UNG - University of Nova Gorica |
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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. |
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Keywords: | magnesium, sulfur, rechargeable batteries, XAS, NMR |
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Year of publishing: | 2017 |
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Number of pages: | 29 |
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Numbering: | 1 |
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COBISS_ID: | 4933883  |
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URN: | URN:SI:UNG:REP:DCJGHMCN |
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DOI: | 10.1021/acs.chemmater.7b03956  |
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License: |  This work is available under this license: Creative Commons Attribution Non-Commercial No Derivatives 4.0 International |
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Views: | 3628 |
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Downloads: | 0 |
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