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Dual Role of Mo(6)S(8) in Polysulfide Conversion and Shuttle for Mg–S Batteries

Magnesium–Sulfur batteries are one of most appealing options among the post‐lithium battery systems due to its potentially high energy density, safe and sustainable electrode materials. The major practical challenges are originated from the soluble magnesium polysulfide intermediates and their shutt...

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Autores principales: Wang, Liping, Jankowski, Piotr, Njel, Christian, Bauer, Werner, Li, Zhenyou, Meng, Zhen, Dasari, Bosubabu, Vegge, Tejs, Lastra, Juan Maria García, Zhao‐Karger, Zhirong, Fichtner, Maximilian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8895118/
https://www.ncbi.nlm.nih.gov/pubmed/35001546
http://dx.doi.org/10.1002/advs.202104605
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author Wang, Liping
Jankowski, Piotr
Njel, Christian
Bauer, Werner
Li, Zhenyou
Meng, Zhen
Dasari, Bosubabu
Vegge, Tejs
Lastra, Juan Maria García
Zhao‐Karger, Zhirong
Fichtner, Maximilian
author_facet Wang, Liping
Jankowski, Piotr
Njel, Christian
Bauer, Werner
Li, Zhenyou
Meng, Zhen
Dasari, Bosubabu
Vegge, Tejs
Lastra, Juan Maria García
Zhao‐Karger, Zhirong
Fichtner, Maximilian
author_sort Wang, Liping
collection PubMed
description Magnesium–Sulfur batteries are one of most appealing options among the post‐lithium battery systems due to its potentially high energy density, safe and sustainable electrode materials. The major practical challenges are originated from the soluble magnesium polysulfide intermediates and their shuttling between the electrodes, which cause high overpotentials, low sulfur utilization, and poor Coulombic efficiency. Herein, a functional Mo(6)S(8) modified separator is designed to effectively address these issues. Both the experimental results and density functional theory calculations show that the electrochemically active Mo(6)S(8) layer has a superior adsorption capability of polysulfides and simultaneously acts as a mediator to accelerate the polysulfide conversion kinetics. Remarkably, the magnesium–sulfur cell assembled with the functional separator delivers a high specific energy density (942.9 mA h g(−1) in the 1st cycle) and can be cycled at 0.2 C for 200 cycles with a Coulombic efficiency of 96%. This work demonstrates a new design concept toward high‐performance metal–sulfur batteries.
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spelling pubmed-88951182022-03-10 Dual Role of Mo(6)S(8) in Polysulfide Conversion and Shuttle for Mg–S Batteries Wang, Liping Jankowski, Piotr Njel, Christian Bauer, Werner Li, Zhenyou Meng, Zhen Dasari, Bosubabu Vegge, Tejs Lastra, Juan Maria García Zhao‐Karger, Zhirong Fichtner, Maximilian Adv Sci (Weinh) Research Articles Magnesium–Sulfur batteries are one of most appealing options among the post‐lithium battery systems due to its potentially high energy density, safe and sustainable electrode materials. The major practical challenges are originated from the soluble magnesium polysulfide intermediates and their shuttling between the electrodes, which cause high overpotentials, low sulfur utilization, and poor Coulombic efficiency. Herein, a functional Mo(6)S(8) modified separator is designed to effectively address these issues. Both the experimental results and density functional theory calculations show that the electrochemically active Mo(6)S(8) layer has a superior adsorption capability of polysulfides and simultaneously acts as a mediator to accelerate the polysulfide conversion kinetics. Remarkably, the magnesium–sulfur cell assembled with the functional separator delivers a high specific energy density (942.9 mA h g(−1) in the 1st cycle) and can be cycled at 0.2 C for 200 cycles with a Coulombic efficiency of 96%. This work demonstrates a new design concept toward high‐performance metal–sulfur batteries. John Wiley and Sons Inc. 2022-01-09 /pmc/articles/PMC8895118/ /pubmed/35001546 http://dx.doi.org/10.1002/advs.202104605 Text en © 2022 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Wang, Liping
Jankowski, Piotr
Njel, Christian
Bauer, Werner
Li, Zhenyou
Meng, Zhen
Dasari, Bosubabu
Vegge, Tejs
Lastra, Juan Maria García
Zhao‐Karger, Zhirong
Fichtner, Maximilian
Dual Role of Mo(6)S(8) in Polysulfide Conversion and Shuttle for Mg–S Batteries
title Dual Role of Mo(6)S(8) in Polysulfide Conversion and Shuttle for Mg–S Batteries
title_full Dual Role of Mo(6)S(8) in Polysulfide Conversion and Shuttle for Mg–S Batteries
title_fullStr Dual Role of Mo(6)S(8) in Polysulfide Conversion and Shuttle for Mg–S Batteries
title_full_unstemmed Dual Role of Mo(6)S(8) in Polysulfide Conversion and Shuttle for Mg–S Batteries
title_short Dual Role of Mo(6)S(8) in Polysulfide Conversion and Shuttle for Mg–S Batteries
title_sort dual role of mo(6)s(8) in polysulfide conversion and shuttle for mg–s batteries
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8895118/
https://www.ncbi.nlm.nih.gov/pubmed/35001546
http://dx.doi.org/10.1002/advs.202104605
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