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Sulfur-impregnated, sandwich-type, hybrid carbon nanosheets with hierarchical porous structure for high-performance lithium-sulfur batteries

Chen, Xi'an, Xiao, Zhubing, Ning, Xutao, Liu, Zheng, Yang, Zhi, Zou, Chao, Wang, Shun, Chen, Xiaohua, Chen, Ying and Huang, Shaoming 2014, Sulfur-impregnated, sandwich-type, hybrid carbon nanosheets with hierarchical porous structure for high-performance lithium-sulfur batteries, Advanced energy materials, vol. 4, no. 13, pp. 1-8, doi: 10.1002/aenm.201301988.

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Title Sulfur-impregnated, sandwich-type, hybrid carbon nanosheets with hierarchical porous structure for high-performance lithium-sulfur batteries
Author(s) Chen, Xi'an
Xiao, Zhubing
Ning, Xutao
Liu, Zheng
Yang, Zhi
Zou, Chao
Wang, Shun
Chen, Xiaohua
Chen, YingORCID iD for Chen, Ying orcid.org/0000-0002-7322-2224
Huang, Shaoming
Journal name Advanced energy materials
Volume number 4
Issue number 13
Start page 1
End page 8
Publisher Wiley
Place of publication Weinheim, Germany
Publication date 2014-09
ISSN 1614-6832
1614-6840
Keyword(s) Graphene
Hierarchical pores
High performance batteries
Hybrid carbon nanosheets
Lithium-sulfur batteries
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Energy & Fuels
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Materials Science
Physics
LI-S BATTERIES
IONIC-LIQUID ELECTROLYTE
MESOPOROUS CARBON
COMPOSITE CATHODES
GRAPHENE OXIDE
ELECTROCHEMICAL PROPERTIES
ENCAPSULATED SULFUR
RATE CAPABILITY
ENERGY-STORAGE
HIGH-CAPACITY
Summary Sandwich-type hybrid carbon nanosheets (SCNMM) consisting of graphene and micro/mesoporous carbon layer are fabricated via a double template method using graphene oxide as the shape-directing agent and SiO2 nanoparticles as the mesoporous guide. The polypyrrole synthesized in situ on the graphene oxide sheets is used as a carbon precursor. The micro/mesoporous strcutures of the SCNMM are created by a carbonization process followed by HF solution etching and KOH treatment. Sulfur is impregnated into the hybrid carbon nanosheets to generate S@SCNMM composites for the cathode materials in Li-S secondary batteries. The microstructures and electrochemical performance of the as-prepared samples are investigated in detail. The hybrid carbon nanosheets, which have a thickness of about 10-25 nm, high surface area of 1588 m2 g-1, and broad pore size distribution of 0.8-6.0 nm, are highly interconnected to form a 3D hierarchical structure. The S@SCNMM sample with the sulfur content of 74 wt% exhibits excellent electrochemical performance, including large reversible capacity, good cycling stability and coulombic efficiency, and good rate capability, which is believed to be due to the structure of hybrid carbon materials with hierarchical porous structure, which have large specific surface area and pore volume.
Language eng
DOI 10.1002/aenm.201301988
Field of Research 100708 Nanomaterials
100706 Nanofabrication, Growth and Self Assembly
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Wiley
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070595

Document type: Journal Article
Collection: Institute for Frontier Materials
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