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Understanding Sulfur Redox Mechanisms in Different Electrolytes for Room-Temperature Na–S Batteries
This work reports influence of two different electrolytes, carbonate ester and ether electrolytes, on the sulfur redox reactions in room-temperature Na–S batteries. Two sulfur cathodes with different S loading ratio and status are investigated. A sulfur-rich composite with most sulfur dispersed on t...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Nature Singapore
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8096878/ https://www.ncbi.nlm.nih.gov/pubmed/34138346 http://dx.doi.org/10.1007/s40820-021-00648-w |
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author | Liu, Hanwen Lai, Wei-Hong Yang, Qiuran Lei, Yaojie Wu, Can Wang, Nana Wang, Yun-Xiao Chou, Shu-Lei Liu, Hua Kun Dou, Shi Xue |
author_facet | Liu, Hanwen Lai, Wei-Hong Yang, Qiuran Lei, Yaojie Wu, Can Wang, Nana Wang, Yun-Xiao Chou, Shu-Lei Liu, Hua Kun Dou, Shi Xue |
author_sort | Liu, Hanwen |
collection | PubMed |
description | This work reports influence of two different electrolytes, carbonate ester and ether electrolytes, on the sulfur redox reactions in room-temperature Na–S batteries. Two sulfur cathodes with different S loading ratio and status are investigated. A sulfur-rich composite with most sulfur dispersed on the surface of a carbon host can realize a high loading ratio (72% S). In contrast, a confined sulfur sample can encapsulate S into the pores of the carbon host with a low loading ratio (44% S). In carbonate ester electrolyte, only the sulfur trapped in porous structures is active via ‘solid–solid’ behavior during cycling. The S cathode with high surface sulfur shows poor reversible capacity because of the severe side reactions between the surface polysulfides and the carbonate ester solvents. To improve the capacity of the sulfur-rich cathode, ether electrolyte with NaNO(3) additive is explored to realize a ‘solid–liquid’ sulfur redox process and confine the shuttle effect of the dissolved polysulfides. As a result, the sulfur-rich cathode achieved high reversible capacity (483 mAh g(−1)), corresponding to a specific energy of 362 Wh kg(−1) after 200 cycles, shedding light on the use of ether electrolyte for high-loading sulfur cathode. [Image: see text] SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s40820-021-00648-w. |
format | Online Article Text |
id | pubmed-8096878 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Springer Nature Singapore |
record_format | MEDLINE/PubMed |
spelling | pubmed-80968782021-06-14 Understanding Sulfur Redox Mechanisms in Different Electrolytes for Room-Temperature Na–S Batteries Liu, Hanwen Lai, Wei-Hong Yang, Qiuran Lei, Yaojie Wu, Can Wang, Nana Wang, Yun-Xiao Chou, Shu-Lei Liu, Hua Kun Dou, Shi Xue Nanomicro Lett Article This work reports influence of two different electrolytes, carbonate ester and ether electrolytes, on the sulfur redox reactions in room-temperature Na–S batteries. Two sulfur cathodes with different S loading ratio and status are investigated. A sulfur-rich composite with most sulfur dispersed on the surface of a carbon host can realize a high loading ratio (72% S). In contrast, a confined sulfur sample can encapsulate S into the pores of the carbon host with a low loading ratio (44% S). In carbonate ester electrolyte, only the sulfur trapped in porous structures is active via ‘solid–solid’ behavior during cycling. The S cathode with high surface sulfur shows poor reversible capacity because of the severe side reactions between the surface polysulfides and the carbonate ester solvents. To improve the capacity of the sulfur-rich cathode, ether electrolyte with NaNO(3) additive is explored to realize a ‘solid–liquid’ sulfur redox process and confine the shuttle effect of the dissolved polysulfides. As a result, the sulfur-rich cathode achieved high reversible capacity (483 mAh g(−1)), corresponding to a specific energy of 362 Wh kg(−1) after 200 cycles, shedding light on the use of ether electrolyte for high-loading sulfur cathode. [Image: see text] SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s40820-021-00648-w. Springer Nature Singapore 2021-05-04 /pmc/articles/PMC8096878/ /pubmed/34138346 http://dx.doi.org/10.1007/s40820-021-00648-w Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Liu, Hanwen Lai, Wei-Hong Yang, Qiuran Lei, Yaojie Wu, Can Wang, Nana Wang, Yun-Xiao Chou, Shu-Lei Liu, Hua Kun Dou, Shi Xue Understanding Sulfur Redox Mechanisms in Different Electrolytes for Room-Temperature Na–S Batteries |
title | Understanding Sulfur Redox Mechanisms in Different Electrolytes for Room-Temperature Na–S Batteries |
title_full | Understanding Sulfur Redox Mechanisms in Different Electrolytes for Room-Temperature Na–S Batteries |
title_fullStr | Understanding Sulfur Redox Mechanisms in Different Electrolytes for Room-Temperature Na–S Batteries |
title_full_unstemmed | Understanding Sulfur Redox Mechanisms in Different Electrolytes for Room-Temperature Na–S Batteries |
title_short | Understanding Sulfur Redox Mechanisms in Different Electrolytes for Room-Temperature Na–S Batteries |
title_sort | understanding sulfur redox mechanisms in different electrolytes for room-temperature na–s batteries |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8096878/ https://www.ncbi.nlm.nih.gov/pubmed/34138346 http://dx.doi.org/10.1007/s40820-021-00648-w |
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