Hierarchical 3D mesoporous silicon@graphene nanoarchitectures for lithium ion batteries with superior performance

Chen, Shuangqiang, Bao, Peite, Huang, Xiaodan, Sun, Bing and Wang, Guoxiu (2014) Hierarchical 3D mesoporous silicon@graphene nanoarchitectures for lithium ion batteries with superior performance. Nano Research, 7 1: 85-94. doi:10.1007/s12274-013-0374-y


Author Chen, Shuangqiang
Bao, Peite
Huang, Xiaodan
Sun, Bing
Wang, Guoxiu
Title Hierarchical 3D mesoporous silicon@graphene nanoarchitectures for lithium ion batteries with superior performance
Journal name Nano Research   Check publisher's open access policy
ISSN 1998-0124
1998-0000
Publication date 2014-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1007/s12274-013-0374-y
Open Access Status Not yet assessed
Volume 7
Issue 1
Start page 85
End page 94
Total pages 10
Place of publication Beijing, China
Publisher Tsinghua University Press
Language eng
Abstract Silicon has been recognized as the most promising anode material for high capacity lithium ion batteries. However, large volume variations during charge and discharge result in pulverization of Si electrodes and fast capacity loss on cycling. This drawback of Si electrodes can be overcome by combination with well-organized graphene foam. In this work, hierarchical three-dimensional carbon-coated mesoporous Si nanospheres@graphene foam (C@Si@GF) nanoarchitectures were successfully synthesized by a thermal bubble ejection assisted chemical-vapor-deposition and magnesiothermic reduction method. The morphology and structure of the as-prepared nanocomposites were characterized by field emission scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. When employed as anode materials in lithium ion batteries, C@Si@GF nanocomposites exhibited superior electrochemical performance including a high specific capacity of 1,200 mAh/g at the current density of 1 A/g, excellent high rate capabilities and an outstanding cyclability. Post-mortem analyses identified that the morphology of 3D C@Si@GF electrodes after 200 cycles was well maintained. The synergistic effects arising from the combination of mesoporous Si nanospheres and graphene foam nanoarchitectures may address the intractable pulverization problem of Si electrode.
Keyword Chemical vapor deposition
Graphene foam
Lithium ion battery
Silicon anode
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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