Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Liang, Xinghua, Wu, Xi, Zeng, Shuaibo, Xu, Wei, Jiang, Xingtao, Lan, Lingxiao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
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
_version_ 1784693636477222912
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
work_keys_str_mv AT liangxinghua fastconversionoflithiumpolysulfidesinlithiumsulfurbatteriesusingthreedimensionalporouscarbon
AT wuxi fastconversionoflithiumpolysulfidesinlithiumsulfurbatteriesusingthreedimensionalporouscarbon
AT zengshuaibo fastconversionoflithiumpolysulfidesinlithiumsulfurbatteriesusingthreedimensionalporouscarbon
AT xuwei fastconversionoflithiumpolysulfidesinlithiumsulfurbatteriesusingthreedimensionalporouscarbon
AT jiangxingtao fastconversionoflithiumpolysulfidesinlithiumsulfurbatteriesusingthreedimensionalporouscarbon
AT lanlingxiao fastconversionoflithiumpolysulfidesinlithiumsulfurbatteriesusingthreedimensionalporouscarbon