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3D dual-confined sulfur encapsulated in porous carbon nanosheets and wrapped with graphene aerogels as a cathode for advanced lithium sulfur batteries.
Nanoscale. 2016 Apr 21; 8(15):8228-35.N

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+Show Affiliations

Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin 53211, USA. jhchen@uwm.edu cyuan@uwm.edu.Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin 53211, USA. jhchen@uwm.edu cyuan@uwm.edu.Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin 53211, USA. jhchen@uwm.edu cyuan@uwm.edu.Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin 53211, USA. jhchen@uwm.edu cyuan@uwm.edu.Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin 53211, USA. jhchen@uwm.edu cyuan@uwm.edu.Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin 53211, USA. jhchen@uwm.edu cyuan@uwm.edu.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

27029963

Citation

Hou, Yang, et al. "3D Dual-confined Sulfur Encapsulated in Porous Carbon Nanosheets and Wrapped With Graphene Aerogels as a Cathode for Advanced Lithium Sulfur Batteries." Nanoscale, vol. 8, no. 15, 2016, pp. 8228-35.
Hou Y, Li J, Gao X, et al. 3D dual-confined sulfur encapsulated in porous carbon nanosheets and wrapped with graphene aerogels as a cathode for advanced lithium sulfur batteries. Nanoscale. 2016;8(15):8228-35.
Hou, Y., Li, J., Gao, X., Wen, Z., Yuan, C., & Chen, J. (2016). 3D dual-confined sulfur encapsulated in porous carbon nanosheets and wrapped with graphene aerogels as a cathode for advanced lithium sulfur batteries. Nanoscale, 8(15), 8228-35. https://doi.org/10.1039/c5nr09037g
Hou Y, et al. 3D Dual-confined Sulfur Encapsulated in Porous Carbon Nanosheets and Wrapped With Graphene Aerogels as a Cathode for Advanced Lithium Sulfur Batteries. Nanoscale. 2016 Apr 21;8(15):8228-35. PubMed PMID: 27029963.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - 3D dual-confined sulfur encapsulated in porous carbon nanosheets and wrapped with graphene aerogels as a cathode for advanced lithium sulfur batteries. AU - Hou,Yang, AU - Li,Jianyang, AU - Gao,Xianfeng, AU - Wen,Zhenhai, AU - Yuan,Chris, AU - Chen,Junhong, PY - 2016/4/1/entrez PY - 2016/4/1/pubmed PY - 2016/4/1/medline SP - 8228 EP - 35 JF - Nanoscale JO - Nanoscale VL - 8 IS - 15 N2 - 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. SN - 2040-3372 UR - https://www.unboundmedicine.com/medline/citation/27029963/3D_dual_confined_sulfur_encapsulated_in_porous_carbon_nanosheets_and_wrapped_with_graphene_aerogels_as_a_cathode_for_advanced_lithium_sulfur_batteries_ L2 - https://doi.org/10.1039/c5nr09037g DB - PRIME DP - Unbound Medicine ER -
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