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Magnesium Anode Protection by an Organic Artificial Solid Electrolyte Interphase for Magnesium-Sulfur Batteries

[Image: see text] In the search for post-lithium battery systems, magnesium–sulfur batteries have attracted research attention in recent years due to their high potential energy density, raw material abundance, and low cost. Despite significant progress, the system still lacks cycling stability main...

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Autores principales: Häcker, Joachim, Rommel, Tobias, Lange, Pia, Zhao-Karger, Zhirong, Morawietz, Tobias, Biswas, Indro, Wagner, Norbert, Nojabaee, Maryam, Friedrich, K. Andreas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10347424/
https://www.ncbi.nlm.nih.gov/pubmed/37389477
http://dx.doi.org/10.1021/acsami.3c07223
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author Häcker, Joachim
Rommel, Tobias
Lange, Pia
Zhao-Karger, Zhirong
Morawietz, Tobias
Biswas, Indro
Wagner, Norbert
Nojabaee, Maryam
Friedrich, K. Andreas
author_facet Häcker, Joachim
Rommel, Tobias
Lange, Pia
Zhao-Karger, Zhirong
Morawietz, Tobias
Biswas, Indro
Wagner, Norbert
Nojabaee, Maryam
Friedrich, K. Andreas
author_sort Häcker, Joachim
collection PubMed
description [Image: see text] In the search for post-lithium battery systems, magnesium–sulfur batteries have attracted research attention in recent years due to their high potential energy density, raw material abundance, and low cost. Despite significant progress, the system still lacks cycling stability mainly associated with the ongoing parasitic reduction of sulfur at the anode surface, resulting in the loss of active materials and passivating surface layer formation on the anode. In addition to sulfur retention approaches on the cathode side, the protection of the reductive anode surface by an artificial solid electrolyte interphase (SEI) represents a promising approach, which contrarily does not impede the sulfur cathode kinetics. In this study, an organic coating approach based on ionomers and polymers is pursued to combine the desired properties of mechanical flexibility and high ionic conductivity while enabling a facile and energy-efficient preparation. Despite exhibiting higher polarization overpotentials in Mg–Mg cells, the charge overpotential in Mg–S cells was decreased by the coated anodes with the initial Coulombic efficiency being significantly increased. Consequently, the discharge capacity after 300 cycles applying an Aquivion/PVDF-coated Mg anode was twice that of a pristine Mg anode, indicating effective polysulfide repulsion from the Mg surface by the artificial SEI. This was backed by operando imaging during long-term OCV revealing a non-colored separator, i.e. mitigated self-discharge. While SEM, AFM, IR and XPS were applied to gain further insights into the surface morphology and composition, scalable coating techniques were investigated in addition to ensure practical relevance. Remarkably therein, the Mg anode preparation and all surface coatings were prepared under ambient conditions, which facilitates future electrode and cell assembly. Overall, this study highlights the important role of Mg anode coatings to improve the electrochemical performance of magnesium–sulfur batteries.
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spelling pubmed-103474242023-07-15 Magnesium Anode Protection by an Organic Artificial Solid Electrolyte Interphase for Magnesium-Sulfur Batteries Häcker, Joachim Rommel, Tobias Lange, Pia Zhao-Karger, Zhirong Morawietz, Tobias Biswas, Indro Wagner, Norbert Nojabaee, Maryam Friedrich, K. Andreas ACS Appl Mater Interfaces [Image: see text] In the search for post-lithium battery systems, magnesium–sulfur batteries have attracted research attention in recent years due to their high potential energy density, raw material abundance, and low cost. Despite significant progress, the system still lacks cycling stability mainly associated with the ongoing parasitic reduction of sulfur at the anode surface, resulting in the loss of active materials and passivating surface layer formation on the anode. In addition to sulfur retention approaches on the cathode side, the protection of the reductive anode surface by an artificial solid electrolyte interphase (SEI) represents a promising approach, which contrarily does not impede the sulfur cathode kinetics. In this study, an organic coating approach based on ionomers and polymers is pursued to combine the desired properties of mechanical flexibility and high ionic conductivity while enabling a facile and energy-efficient preparation. Despite exhibiting higher polarization overpotentials in Mg–Mg cells, the charge overpotential in Mg–S cells was decreased by the coated anodes with the initial Coulombic efficiency being significantly increased. Consequently, the discharge capacity after 300 cycles applying an Aquivion/PVDF-coated Mg anode was twice that of a pristine Mg anode, indicating effective polysulfide repulsion from the Mg surface by the artificial SEI. This was backed by operando imaging during long-term OCV revealing a non-colored separator, i.e. mitigated self-discharge. While SEM, AFM, IR and XPS were applied to gain further insights into the surface morphology and composition, scalable coating techniques were investigated in addition to ensure practical relevance. Remarkably therein, the Mg anode preparation and all surface coatings were prepared under ambient conditions, which facilitates future electrode and cell assembly. Overall, this study highlights the important role of Mg anode coatings to improve the electrochemical performance of magnesium–sulfur batteries. American Chemical Society 2023-06-30 /pmc/articles/PMC10347424/ /pubmed/37389477 http://dx.doi.org/10.1021/acsami.3c07223 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Häcker, Joachim
Rommel, Tobias
Lange, Pia
Zhao-Karger, Zhirong
Morawietz, Tobias
Biswas, Indro
Wagner, Norbert
Nojabaee, Maryam
Friedrich, K. Andreas
Magnesium Anode Protection by an Organic Artificial Solid Electrolyte Interphase for Magnesium-Sulfur Batteries
title Magnesium Anode Protection by an Organic Artificial Solid Electrolyte Interphase for Magnesium-Sulfur Batteries
title_full Magnesium Anode Protection by an Organic Artificial Solid Electrolyte Interphase for Magnesium-Sulfur Batteries
title_fullStr Magnesium Anode Protection by an Organic Artificial Solid Electrolyte Interphase for Magnesium-Sulfur Batteries
title_full_unstemmed Magnesium Anode Protection by an Organic Artificial Solid Electrolyte Interphase for Magnesium-Sulfur Batteries
title_short Magnesium Anode Protection by an Organic Artificial Solid Electrolyte Interphase for Magnesium-Sulfur Batteries
title_sort magnesium anode protection by an organic artificial solid electrolyte interphase for magnesium-sulfur batteries
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10347424/
https://www.ncbi.nlm.nih.gov/pubmed/37389477
http://dx.doi.org/10.1021/acsami.3c07223
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