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Binder-free three-dimensional silicon/carbon nanowire networks for high performance lithium-ion battery anodes
Wang W; Tian M; Wei YJ(魏宇杰); Lee SH; Lee YC; Yang RG
Source PublicationNano Energy
2013-09
Volume2Issue:5Pages:943-950
ISSN2211-2855
AbstractThe three-dimensional (3-D) nano-architectures have attracted tremendous attention for applications in lithium-ion (Li-ion) batteries due to their unique structural advantages. In this work, we developed a facile approach to fabricate 3-D Silicon (Si) nanowire networks. By precipitation, Si nanowires spontaneously interwove with one another to form 3-D nanowire networks with large amount of micro/nano gaps, which can not only facilitate Li-ion transport but also effectively accommodate the volume change. Carbon coating was then applied on Si nanowire networks through a chemical vapor deposition (CVD) process, which not only mechanically strengthens the structure but also helps the formation of 3-D electrical conducting network. A Si/C nanowire network with a wire diameter of 75 nm and 12 wt% of carbon coating exhibits a very high specific capacity of 2300 mAh g(-1) at a rate of C/5 and a high specific capacity of around 600 mAh g(-1) at a high rate of 4.5C. Our experimental investigations showed that the cycle life of such Si/C nanowire network can be further prolonged by increasing the carbon coating content, decreasing the diameters of Si nanowires, or reducing the testing voltage window. A Si/C nanowire network with a wire diameter of 37 nm and 17 wt% carbon coating can retain 78% of the initial capacity after 60 cycles in a testing voltage window of 0.1-2 V. 
DOI10.1016/j.nanoen.2013.03.015
Indexed BySCI ; EI
Language英语
WOS IDWOS:000326134200042
Funding OrganizationDARPA Center on Nanoscale Science and Technology for Integrated Micro/Nano-Electromechanical Transducers (iMINT) Defense Advanced Research Projects Agency (DARPA) N/MEMS S&T Fundamentals program N66001-10-1-4007 National Science Foundation ECS-0335765
Classification一类
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59159
Collection非线性力学国家重点实验室
Recommended Citation
GB/T 7714
Wang W,Tian M,Wei YJ,et al. Binder-free three-dimensional silicon/carbon nanowire networks for high performance lithium-ion battery anodes[J]. Nano Energy,2013,2(5):943-950.
APA Wang W,Tian M,Wei YJ,Lee SH,Lee YC,&Yang RG.(2013).Binder-free three-dimensional silicon/carbon nanowire networks for high performance lithium-ion battery anodes.Nano Energy,2(5),943-950.
MLA Wang W,et al."Binder-free three-dimensional silicon/carbon nanowire networks for high performance lithium-ion battery anodes".Nano Energy 2.5(2013):943-950.
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