Hierarchical multi-channels conductive framework constructed with rGO modified natural biochar for high sulfur areal loading self-supporting cathode of lithium-sulfur batteries

The insulation of sulfur and Li2S/Li2S2 (discharge products) and the “shuttle” of soluble lithium polysulfides (LiPSs) seriously limit the research of high specific capacity lithium-sulfur (Li-S) batteries with high sulfur loading. Inspired by the natural architecture of pomelo peels, we report a se...

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Autores principales:	Chaojiang Fan, Rong Yang, Yong Huang, Yinglin Yan, YuanYuan Yang, Yun Yang, Yiming Zou, Yunhua Xu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Lithium-sulfur battery Self-supporting cathode Conductive framework High sulfur areal loading Electrochemical performance Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/06511b5c831946e0ab2cfff04b58dedf
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spelling	oai:doaj.org-article:06511b5c831946e0ab2cfff04b58dedf2021-11-20T05:15:21ZHierarchical multi-channels conductive framework constructed with rGO modified natural biochar for high sulfur areal loading self-supporting cathode of lithium-sulfur batteries2666-821110.1016/j.ceja.2021.100209https://doaj.org/article/06511b5c831946e0ab2cfff04b58dedf2022-03-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121001241https://doaj.org/toc/2666-8211The insulation of sulfur and Li2S/Li2S2 (discharge products) and the “shuttle” of soluble lithium polysulfides (LiPSs) seriously limit the research of high specific capacity lithium-sulfur (Li-S) batteries with high sulfur loading. Inspired by the natural architecture of pomelo peels, we report a self-supporting carbon framework (SCF) modified by reduced graphene oxide (rGO) as conductive skeleton and sulfur carrier for the cathode of rechargeable Li-S batteries. The high initial capacity (1489.65 mA h g−1) of SCF@rGO/S binder-free cathode with the high sulfur areal loading (∼5.50 mg cm−2) arise from the improved batteries conductivity by the interconnecting conductive skeleton. The SCF@rGO with hierarchical porous structure, abundant microchannels and oxygenic functional groups can effectively physical limit/intercept and chemical adsorption/anchor LiPSs, thereby improving the utilization of active sulfur and promoting the reuse. Sufficient active sites in SCF@rGO/S provide close electrical contact to accelerate electrons and ions transfer, resulting in high electrochemical activity and redox kinetics. Consequently, the SCF@rGO/S cathode exhibits an outstanding capacity retention (569.66 mA h g−1) and cycle stability at 1 C for over 200 long-term cycles with a decline of only 0.13% per cycle. Even at 2 C, the capacity is still up to 645.59 mA h g−1. The SCF@rGO/S cathode provide a feasible approach and strategy to develop high performance Li-S batteries.Chaojiang FanRong YangYong HuangYinglin YanYuanYuan YangYun YangYiming ZouYunhua XuElsevierarticleLithium-sulfur batterySelf-supporting cathodeConductive frameworkHigh sulfur areal loadingElectrochemical performanceChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 9, Iss , Pp 100209- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Lithium-sulfur battery Self-supporting cathode Conductive framework High sulfur areal loading Electrochemical performance Chemical engineering TP155-156
spellingShingle	Lithium-sulfur battery Self-supporting cathode Conductive framework High sulfur areal loading Electrochemical performance Chemical engineering TP155-156 Chaojiang Fan Rong Yang Yong Huang Yinglin Yan YuanYuan Yang Yun Yang Yiming Zou Yunhua Xu Hierarchical multi-channels conductive framework constructed with rGO modified natural biochar for high sulfur areal loading self-supporting cathode of lithium-sulfur batteries
description	The insulation of sulfur and Li2S/Li2S2 (discharge products) and the “shuttle” of soluble lithium polysulfides (LiPSs) seriously limit the research of high specific capacity lithium-sulfur (Li-S) batteries with high sulfur loading. Inspired by the natural architecture of pomelo peels, we report a self-supporting carbon framework (SCF) modified by reduced graphene oxide (rGO) as conductive skeleton and sulfur carrier for the cathode of rechargeable Li-S batteries. The high initial capacity (1489.65 mA h g−1) of SCF@rGO/S binder-free cathode with the high sulfur areal loading (∼5.50 mg cm−2) arise from the improved batteries conductivity by the interconnecting conductive skeleton. The SCF@rGO with hierarchical porous structure, abundant microchannels and oxygenic functional groups can effectively physical limit/intercept and chemical adsorption/anchor LiPSs, thereby improving the utilization of active sulfur and promoting the reuse. Sufficient active sites in SCF@rGO/S provide close electrical contact to accelerate electrons and ions transfer, resulting in high electrochemical activity and redox kinetics. Consequently, the SCF@rGO/S cathode exhibits an outstanding capacity retention (569.66 mA h g−1) and cycle stability at 1 C for over 200 long-term cycles with a decline of only 0.13% per cycle. Even at 2 C, the capacity is still up to 645.59 mA h g−1. The SCF@rGO/S cathode provide a feasible approach and strategy to develop high performance Li-S batteries.
format	article
author	Chaojiang Fan Rong Yang Yong Huang Yinglin Yan YuanYuan Yang Yun Yang Yiming Zou Yunhua Xu
author_facet	Chaojiang Fan Rong Yang Yong Huang Yinglin Yan YuanYuan Yang Yun Yang Yiming Zou Yunhua Xu
author_sort	Chaojiang Fan
title	Hierarchical multi-channels conductive framework constructed with rGO modified natural biochar for high sulfur areal loading self-supporting cathode of lithium-sulfur batteries
title_short	Hierarchical multi-channels conductive framework constructed with rGO modified natural biochar for high sulfur areal loading self-supporting cathode of lithium-sulfur batteries
title_full	Hierarchical multi-channels conductive framework constructed with rGO modified natural biochar for high sulfur areal loading self-supporting cathode of lithium-sulfur batteries
title_fullStr	Hierarchical multi-channels conductive framework constructed with rGO modified natural biochar for high sulfur areal loading self-supporting cathode of lithium-sulfur batteries
title_full_unstemmed	Hierarchical multi-channels conductive framework constructed with rGO modified natural biochar for high sulfur areal loading self-supporting cathode of lithium-sulfur batteries
title_sort	hierarchical multi-channels conductive framework constructed with rgo modified natural biochar for high sulfur areal loading self-supporting cathode of lithium-sulfur batteries
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/06511b5c831946e0ab2cfff04b58dedf
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Hierarchical multi-channels conductive framework constructed with rGO modified natural biochar for high sulfur areal loading self-supporting cathode of lithium-sulfur batteries

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