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Fast conversion of lithium (poly)sulfides in lithium–sulfur batteries using three-dimensional porous carbon
The slow redox kinetics of polysulfide hinders the rapid and complete conversion between soluble polysulfides and Li(2)S(2)/Li(2)S, resulting in unsatisfactory rate and cycle performance in lithium-sulfur batteries. Electrochemical catalysis, one effective method, promotes the reaction kinetics and...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9037002/ https://www.ncbi.nlm.nih.gov/pubmed/35478876 http://dx.doi.org/10.1039/d1ra02704b |
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author | Liang, Xinghua Wu, Xi Zeng, Shuaibo Xu, Wei Jiang, Xingtao Lan, Lingxiao |
author_facet | Liang, Xinghua Wu, Xi Zeng, Shuaibo Xu, Wei Jiang, Xingtao Lan, Lingxiao |
author_sort | Liang, Xinghua |
collection | PubMed |
description | The slow redox kinetics of polysulfide hinders the rapid and complete conversion between soluble polysulfides and Li(2)S(2)/Li(2)S, resulting in unsatisfactory rate and cycle performance in lithium-sulfur batteries. Electrochemical catalysis, one effective method, promotes the reaction kinetics and inhibits the “shuttle effect”. Here, we present a three-dimensional ordered macro-porous carbon with abundant cobalt–nitrogen–carbon active sites as a matrix catalyst, leading to accelerated polysulfide redox kinetics. In addition, the interconnected conductive frameworks with ordered macro-porous carbon afford fast ion/electron transport and provide sufficient space to adapt to the volume expansion of the sulfur electrode. Owing to the aforementioned advantages, a lithium–sulfur battery with the matrix catalyst delivers a high specific capacity (1140 mA h g(−1) at 0.1C) and a low capacity decay rate (0.0937% per cycle over 500 cycles). Moreover, there is a high rate capacity (349.1 mA h g(−1)) even at the high current density of 2C and sulfur loading of 3.8 mg cm(−2) due to the improved polysulfide redox kinetics by a catalytic effect. |
format | Online Article Text |
id | pubmed-9037002 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90370022022-04-26 Fast conversion of lithium (poly)sulfides in lithium–sulfur batteries using three-dimensional porous carbon Liang, Xinghua Wu, Xi Zeng, Shuaibo Xu, Wei Jiang, Xingtao Lan, Lingxiao RSC Adv Chemistry The slow redox kinetics of polysulfide hinders the rapid and complete conversion between soluble polysulfides and Li(2)S(2)/Li(2)S, resulting in unsatisfactory rate and cycle performance in lithium-sulfur batteries. Electrochemical catalysis, one effective method, promotes the reaction kinetics and inhibits the “shuttle effect”. Here, we present a three-dimensional ordered macro-porous carbon with abundant cobalt–nitrogen–carbon active sites as a matrix catalyst, leading to accelerated polysulfide redox kinetics. In addition, the interconnected conductive frameworks with ordered macro-porous carbon afford fast ion/electron transport and provide sufficient space to adapt to the volume expansion of the sulfur electrode. Owing to the aforementioned advantages, a lithium–sulfur battery with the matrix catalyst delivers a high specific capacity (1140 mA h g(−1) at 0.1C) and a low capacity decay rate (0.0937% per cycle over 500 cycles). Moreover, there is a high rate capacity (349.1 mA h g(−1)) even at the high current density of 2C and sulfur loading of 3.8 mg cm(−2) due to the improved polysulfide redox kinetics by a catalytic effect. The Royal Society of Chemistry 2021-07-21 /pmc/articles/PMC9037002/ /pubmed/35478876 http://dx.doi.org/10.1039/d1ra02704b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Liang, Xinghua Wu, Xi Zeng, Shuaibo Xu, Wei Jiang, Xingtao Lan, Lingxiao Fast conversion of lithium (poly)sulfides in lithium–sulfur batteries using three-dimensional porous carbon |
title | Fast conversion of lithium (poly)sulfides in lithium–sulfur batteries using three-dimensional porous carbon |
title_full | Fast conversion of lithium (poly)sulfides in lithium–sulfur batteries using three-dimensional porous carbon |
title_fullStr | Fast conversion of lithium (poly)sulfides in lithium–sulfur batteries using three-dimensional porous carbon |
title_full_unstemmed | Fast conversion of lithium (poly)sulfides in lithium–sulfur batteries using three-dimensional porous carbon |
title_short | Fast conversion of lithium (poly)sulfides in lithium–sulfur batteries using three-dimensional porous carbon |
title_sort | fast conversion of lithium (poly)sulfides in lithium–sulfur batteries using three-dimensional porous carbon |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9037002/ https://www.ncbi.nlm.nih.gov/pubmed/35478876 http://dx.doi.org/10.1039/d1ra02704b |
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