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Influence of Electrolyte on the Electrode/Electrolyte Interface Formation on InSb Electrode in Mg-Ion Batteries

Achieving the full potential of magnesium-ion batteries (MIBs) is still a challenge due to the lack of adequate electrodes or electrolytes. Grignard-based electrolytes show excellent Mg plating/stripping, but their incompatibility with oxide cathodes restricts their use. Conventional electrolytes li...

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Autores principales: Mohammad, Irshad, Blondeau, Lucie, Leroy, Jocelyne, Khodja, Hicham, Gauthier, Magali
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8472600/
https://www.ncbi.nlm.nih.gov/pubmed/34577192
http://dx.doi.org/10.3390/molecules26185721
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author Mohammad, Irshad
Blondeau, Lucie
Leroy, Jocelyne
Khodja, Hicham
Gauthier, Magali
author_facet Mohammad, Irshad
Blondeau, Lucie
Leroy, Jocelyne
Khodja, Hicham
Gauthier, Magali
author_sort Mohammad, Irshad
collection PubMed
description Achieving the full potential of magnesium-ion batteries (MIBs) is still a challenge due to the lack of adequate electrodes or electrolytes. Grignard-based electrolytes show excellent Mg plating/stripping, but their incompatibility with oxide cathodes restricts their use. Conventional electrolytes like bis(trifluoromethanesulfonyl)imide ((Mg(TFSI)(2)) solutions are incompatible with Mg metal, which hinders their application in high-energy Mg batteries. In this regard, alloys can be game changers. The insertion/extraction of Mg(2+) in alloys is possible in conventional electrolytes, suggesting the absence of a passivation layer or the formation of a conductive surface layer. Yet, the role and influence of this layer on the alloys performance have been studied only scarcely. To evaluate the reactivity of alloys, we studied InSb as a model material. Ex situ X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy were used to investigate the surface behavior of InSb in both Grignard and conventional Mg(TFSI)(2)/DME electrolytes. For the Grignard electrolyte, we discovered an intrinsic instability of both solvent and salt against InSb. XPS showed the formation of a thick surface layer consisting of hydrocarbon species and degradation products from the solvent (THF) and salt (C(2)H(5)MgCl−(C(2)H(5))(2)AlCl). On the contrary, this study highlighted the stability of InSb in Mg(TFSI)(2) electrolyte.
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spelling pubmed-84726002021-09-28 Influence of Electrolyte on the Electrode/Electrolyte Interface Formation on InSb Electrode in Mg-Ion Batteries Mohammad, Irshad Blondeau, Lucie Leroy, Jocelyne Khodja, Hicham Gauthier, Magali Molecules Article Achieving the full potential of magnesium-ion batteries (MIBs) is still a challenge due to the lack of adequate electrodes or electrolytes. Grignard-based electrolytes show excellent Mg plating/stripping, but their incompatibility with oxide cathodes restricts their use. Conventional electrolytes like bis(trifluoromethanesulfonyl)imide ((Mg(TFSI)(2)) solutions are incompatible with Mg metal, which hinders their application in high-energy Mg batteries. In this regard, alloys can be game changers. The insertion/extraction of Mg(2+) in alloys is possible in conventional electrolytes, suggesting the absence of a passivation layer or the formation of a conductive surface layer. Yet, the role and influence of this layer on the alloys performance have been studied only scarcely. To evaluate the reactivity of alloys, we studied InSb as a model material. Ex situ X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy were used to investigate the surface behavior of InSb in both Grignard and conventional Mg(TFSI)(2)/DME electrolytes. For the Grignard electrolyte, we discovered an intrinsic instability of both solvent and salt against InSb. XPS showed the formation of a thick surface layer consisting of hydrocarbon species and degradation products from the solvent (THF) and salt (C(2)H(5)MgCl−(C(2)H(5))(2)AlCl). On the contrary, this study highlighted the stability of InSb in Mg(TFSI)(2) electrolyte. MDPI 2021-09-21 /pmc/articles/PMC8472600/ /pubmed/34577192 http://dx.doi.org/10.3390/molecules26185721 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mohammad, Irshad
Blondeau, Lucie
Leroy, Jocelyne
Khodja, Hicham
Gauthier, Magali
Influence of Electrolyte on the Electrode/Electrolyte Interface Formation on InSb Electrode in Mg-Ion Batteries
title Influence of Electrolyte on the Electrode/Electrolyte Interface Formation on InSb Electrode in Mg-Ion Batteries
title_full Influence of Electrolyte on the Electrode/Electrolyte Interface Formation on InSb Electrode in Mg-Ion Batteries
title_fullStr Influence of Electrolyte on the Electrode/Electrolyte Interface Formation on InSb Electrode in Mg-Ion Batteries
title_full_unstemmed Influence of Electrolyte on the Electrode/Electrolyte Interface Formation on InSb Electrode in Mg-Ion Batteries
title_short Influence of Electrolyte on the Electrode/Electrolyte Interface Formation on InSb Electrode in Mg-Ion Batteries
title_sort influence of electrolyte on the electrode/electrolyte interface formation on insb electrode in mg-ion batteries
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8472600/
https://www.ncbi.nlm.nih.gov/pubmed/34577192
http://dx.doi.org/10.3390/molecules26185721
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