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Title: 3D dual-confined sulfur encapsulated in porous carbon nanosheets and wrapped with graphene aerogels as a cathode for advanced lithium sulfur batteries

Abstract

Although lithium–sulfur (Li–S) batteries have attracted much attention due to their high theoretical specific energy and low cost, their practical applications have been severely hindered by poor cycle life, inadequate sulfur utilization, and the insulating nature of sulfur. Here, we report a rationally designed Li–S cathode with a dual-confined configuration formed by confining sulfur in 2D carbon nanosheets with an abundant porous structure followed by 3D graphene aerogel wrapping. The porous carbon nanosheets act as the sulfur host and suppress the diffusion of polysulfide, while the graphene conductive networks anchor the sulfur-adsorbed carbon nanosheets, providing pathways for rapid electron/ion transport and preventing polysulfide dissolution. As a result, the hybrid electrode exhibits superior electrochemical performance, including a large reversible capacity of 1328 mA h g -1 in the first cycle, excellent cycling stability (maintaining a reversible capacity of 647 mA h g -1 at 0.2 C after 300 cycles) with nearly 100% Coulombic efficiency, and a high rate capability of 512 mA h g -1 at 8 C for 30 cycles, which is among the best reported rate capabilities.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. Univ. of Wisconsin, Milwaukee, WI (United States). Dept. of Mechanical Engineering
Publication Date:
Research Org.:
Univ. of Wisconsin, Milwaukee, WI (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1437631
Grant/Contract Number:  
EE0003208
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nanoscale
Additional Journal Information:
Journal Volume: 8; Journal Issue: 15; Journal ID: ISSN 2040-3364
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Hou, Yang, Li, Jianyang, Gao, Xianfeng, Wen, Zhenhai, Yuan, Chris, and Chen, Junhong. 3D dual-confined sulfur encapsulated in porous carbon nanosheets and wrapped with graphene aerogels as a cathode for advanced lithium sulfur batteries. United States: N. p., 2016. Web. doi:10.1039/c5nr09037g.
Hou, Yang, Li, Jianyang, Gao, Xianfeng, Wen, Zhenhai, Yuan, Chris, & Chen, Junhong. 3D dual-confined sulfur encapsulated in porous carbon nanosheets and wrapped with graphene aerogels as a cathode for advanced lithium sulfur batteries. United States. doi:10.1039/c5nr09037g.
Hou, Yang, Li, Jianyang, Gao, Xianfeng, Wen, Zhenhai, Yuan, Chris, and Chen, Junhong. Tue . "3D dual-confined sulfur encapsulated in porous carbon nanosheets and wrapped with graphene aerogels as a cathode for advanced lithium sulfur batteries". United States. doi:10.1039/c5nr09037g. https://www.osti.gov/servlets/purl/1437631.
@article{osti_1437631,
title = {3D dual-confined sulfur encapsulated in porous carbon nanosheets and wrapped with graphene aerogels as a cathode for advanced lithium sulfur batteries},
author = {Hou, Yang and Li, Jianyang and Gao, Xianfeng and Wen, Zhenhai and Yuan, Chris and Chen, Junhong},
abstractNote = {Although lithium–sulfur (Li–S) batteries have attracted much attention due to their high theoretical specific energy and low cost, their practical applications have been severely hindered by poor cycle life, inadequate sulfur utilization, and the insulating nature of sulfur. Here, we report a rationally designed Li–S cathode with a dual-confined configuration formed by confining sulfur in 2D carbon nanosheets with an abundant porous structure followed by 3D graphene aerogel wrapping. The porous carbon nanosheets act as the sulfur host and suppress the diffusion of polysulfide, while the graphene conductive networks anchor the sulfur-adsorbed carbon nanosheets, providing pathways for rapid electron/ion transport and preventing polysulfide dissolution. As a result, the hybrid electrode exhibits superior electrochemical performance, including a large reversible capacity of 1328 mA h g-1 in the first cycle, excellent cycling stability (maintaining a reversible capacity of 647 mA h g-1 at 0.2 C after 300 cycles) with nearly 100% Coulombic efficiency, and a high rate capability of 512 mA h g-1 at 8 C for 30 cycles, which is among the best reported rate capabilities.},
doi = {10.1039/c5nr09037g},
journal = {Nanoscale},
number = 15,
volume = 8,
place = {United States},
year = {Tue Mar 15 00:00:00 EDT 2016},
month = {Tue Mar 15 00:00:00 EDT 2016}
}

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Cited by: 26 works
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Works referenced in this record:

Sulfur–mesoporous carbon composites in conjunction with a novel ionic liquid electrolyte for lithium rechargeable batteries
journal, February 2008


Preparation of Graphitic Oxide
journal, March 1958

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