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A highly efficient double-hierarchical sulfur host for advanced lithium–sulfur batteries

Li–S batteries have attracted enormous interest due to their potentially high energy density, non-toxicity and the low cost of sulfur. The main challenges of sulfur cathodes are the short cycling life and limited power density caused by the low conductivity of sulfur and dissolution of Li polysulfid...

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Autores principales: Hu, Linyu, Dai, Chunlong, Lim, Jin-Myoung, Chen, Yuming, Lian, Xin, Wang, Minqiang, Li, Yi, Xiao, Penghao, Henkelman, Graeme, Xu, Maowen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5869551/
https://www.ncbi.nlm.nih.gov/pubmed/29629134
http://dx.doi.org/10.1039/c7sc03960c
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author Hu, Linyu
Dai, Chunlong
Lim, Jin-Myoung
Chen, Yuming
Lian, Xin
Wang, Minqiang
Li, Yi
Xiao, Penghao
Henkelman, Graeme
Xu, Maowen
author_facet Hu, Linyu
Dai, Chunlong
Lim, Jin-Myoung
Chen, Yuming
Lian, Xin
Wang, Minqiang
Li, Yi
Xiao, Penghao
Henkelman, Graeme
Xu, Maowen
author_sort Hu, Linyu
collection PubMed
description Li–S batteries have attracted enormous interest due to their potentially high energy density, non-toxicity and the low cost of sulfur. The main challenges of sulfur cathodes are the short cycling life and limited power density caused by the low conductivity of sulfur and dissolution of Li polysulfides. Here we design a new double-hierarchical sulfur host to address these problems. Hierarchical carbon spheres (HCSs), constructed from building blocks of hollow carbon nanobubbles for loading sulfur, are sealed within a thin, polar MoS(2) coating composed of ultrathin nanosheets. Experimental and theoretical studies show a strong absorption of the MoS(2) nanoshell to polysulfides, and the excellent stability of the MoS(2) nanosheets after the adsorption of polysulfides. Moreover, MoS(2) promotes the electrochemical redox kinetics in Li–S batteries. Benefiting from the unique hierarchical, hollow and compositional characteristics of the host, the S/MoS(2)@HCS composite electrode shows a high capacity of 1048 mA h g(–1) at 0.2C, good rate capacity and long cycling life with a slow capacity decay of 0.06% per cycle.
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spelling pubmed-58695512018-04-06 A highly efficient double-hierarchical sulfur host for advanced lithium–sulfur batteries Hu, Linyu Dai, Chunlong Lim, Jin-Myoung Chen, Yuming Lian, Xin Wang, Minqiang Li, Yi Xiao, Penghao Henkelman, Graeme Xu, Maowen Chem Sci Chemistry Li–S batteries have attracted enormous interest due to their potentially high energy density, non-toxicity and the low cost of sulfur. The main challenges of sulfur cathodes are the short cycling life and limited power density caused by the low conductivity of sulfur and dissolution of Li polysulfides. Here we design a new double-hierarchical sulfur host to address these problems. Hierarchical carbon spheres (HCSs), constructed from building blocks of hollow carbon nanobubbles for loading sulfur, are sealed within a thin, polar MoS(2) coating composed of ultrathin nanosheets. Experimental and theoretical studies show a strong absorption of the MoS(2) nanoshell to polysulfides, and the excellent stability of the MoS(2) nanosheets after the adsorption of polysulfides. Moreover, MoS(2) promotes the electrochemical redox kinetics in Li–S batteries. Benefiting from the unique hierarchical, hollow and compositional characteristics of the host, the S/MoS(2)@HCS composite electrode shows a high capacity of 1048 mA h g(–1) at 0.2C, good rate capacity and long cycling life with a slow capacity decay of 0.06% per cycle. Royal Society of Chemistry 2017-11-06 /pmc/articles/PMC5869551/ /pubmed/29629134 http://dx.doi.org/10.1039/c7sc03960c Text en This journal is © The Royal Society of Chemistry 2018 http://creativecommons.org/licenses/by/3.0/ This article is freely available. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0)
spellingShingle Chemistry
Hu, Linyu
Dai, Chunlong
Lim, Jin-Myoung
Chen, Yuming
Lian, Xin
Wang, Minqiang
Li, Yi
Xiao, Penghao
Henkelman, Graeme
Xu, Maowen
A highly efficient double-hierarchical sulfur host for advanced lithium–sulfur batteries
title A highly efficient double-hierarchical sulfur host for advanced lithium–sulfur batteries
title_full A highly efficient double-hierarchical sulfur host for advanced lithium–sulfur batteries
title_fullStr A highly efficient double-hierarchical sulfur host for advanced lithium–sulfur batteries
title_full_unstemmed A highly efficient double-hierarchical sulfur host for advanced lithium–sulfur batteries
title_short A highly efficient double-hierarchical sulfur host for advanced lithium–sulfur batteries
title_sort highly efficient double-hierarchical sulfur host for advanced lithium–sulfur batteries
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5869551/
https://www.ncbi.nlm.nih.gov/pubmed/29629134
http://dx.doi.org/10.1039/c7sc03960c
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