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Growth of linked silicon/carbon nanospheres on copper substrate as integrated electrodes for Li-ion batteries
Alternative TitleNanoscale
Zhang, Zailei1; Wang, Yanhong1; Tan, Qiangqiang1; Li, Dan1; Chen, Yunfa1; Zhong, Ziyi2; Su, Fabing1
2014
Source PublicationNANOSCALE
ISSN2040-3364
Volume6Issue:1Pages:371-377
AbstractWe report the growth of linked silicon/carbon (Si/C) nanospheres on Cu substrate as an integrated anode for Li-ion batteries. The Si/C nanospheres were synthesized by a catalytic chemical vapor deposition (CCVD) on Cu substrate as current collector using methyltrichlorosilane as precursor, a cheap byproduct of the organosilane industry. The samples were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, thermal gravimetry, Raman spectroscopy, nitrogen adsorption, inductively coupled plasma optical emission spectrometry, and X-ray photoelectron spectroscopy. It was found that the linked Si/C nanospheres with a diameter of 400-500 nm contain Si, CuxSi, and Cu nanocrystals, which are highly dispersed in the amorphous carbon nanospheres. A CCVD mechanism was tentatively proposed, in which the evaporated Cu atoms play a critical role to catalytically grown Si nanocrystals embedded within linked Si/C nanospheres. The electrochemical measurement shows that these Si/C nanospheres delivered a capacity of 998.9, 713.1, 320.6, and 817.8 mA h g(-1) at 50, 200, 800, and 50 mA g(-1) respectively after 50 cycles, much higher than that of commercial graphite anode. This is because the amorphous carbon, CuxSi, and Cu in the Si/C nanospheres could buffer the volume change of Si nanocrystals during the Li insertion and extraction reactions, thus hindering the cracking or crumbling of the electrode. Furthermore, the incorporation of conductive CuxSi and Cu nanocrystals and the integration of active electrode materials with Cu substrate may improve the electrical conductivity from the current collector to individual Si active particles, resulting in a remarkably enhanced reversible capacity and cycling stability. The work will be helpful in the fabrication of low cost binder-free Si/C anode materials for Li-ion batteries.; We report the growth of linked silicon/carbon (Si/C) nanospheres on Cu substrate as an integrated anode for Li-ion batteries. The Si/C nanospheres were synthesized by a catalytic chemical vapor deposition (CCVD) on Cu substrate as current collector using methyltrichlorosilane as precursor, a cheap byproduct of the organosilane industry. The samples were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, thermal gravimetry, Raman spectroscopy, nitrogen adsorption, inductively coupled plasma optical emission spectrometry, and X-ray photoelectron spectroscopy. It was found that the linked Si/C nanospheres with a diameter of 400-500 nm contain Si, CuxSi, and Cu nanocrystals, which are highly dispersed in the amorphous carbon nanospheres. A CCVD mechanism was tentatively proposed, in which the evaporated Cu atoms play a critical role to catalytically grown Si nanocrystals embedded within linked Si/C nanospheres. The electrochemical measurement shows that these Si/C nanospheres delivered a capacity of 998.9, 713.1, 320.6, and 817.8 mA h g(-1) at 50, 200, 800, and 50 mA g(-1) respectively after 50 cycles, much higher than that of commercial graphite anode. This is because the amorphous carbon, CuxSi, and Cu in the Si/C nanospheres could buffer the volume change of Si nanocrystals during the Li insertion and extraction reactions, thus hindering the cracking or crumbling of the electrode. Furthermore, the incorporation of conductive CuxSi and Cu nanocrystals and the integration of active electrode materials with Cu substrate may improve the electrical conductivity from the current collector to individual Si active particles, resulting in a remarkably enhanced reversible capacity and cycling stability. The work will be helpful in the fabrication of low cost binder-free Si/C anode materials for Li-ion batteries.
KeywordChemical-vapor-deposition Binder-free Anode Lithium Secondary Batteries High-performance Anode High-capacity Amorphous-silicon Composite Anode Rechargeable Batteries Graphite Microspheres Facile Synthesis
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1039/c3nr04323a
URL查看原文
Indexed BySCI
Language英语
WOS KeywordCHEMICAL-VAPOR-DEPOSITION ; BINDER-FREE ANODE ; LITHIUM SECONDARY BATTERIES ; HIGH-PERFORMANCE ANODE ; HIGH-CAPACITY ; AMORPHOUS-SILICON ; COMPOSITE ANODE ; RECHARGEABLE BATTERIES ; GRAPHITE MICROSPHERES ; FACILE SYNTHESIS
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000328673000043
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Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8108
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.ASTAR, Inst Chem Engn & Sci, Singapore 627833, Singapore
Recommended Citation
GB/T 7714
Zhang, Zailei,Wang, Yanhong,Tan, Qiangqiang,et al. Growth of linked silicon/carbon nanospheres on copper substrate as integrated electrodes for Li-ion batteries[J]. NANOSCALE,2014,6(1):371-377.
APA Zhang, Zailei.,Wang, Yanhong.,Tan, Qiangqiang.,Li, Dan.,Chen, Yunfa.,...&Su, Fabing.(2014).Growth of linked silicon/carbon nanospheres on copper substrate as integrated electrodes for Li-ion batteries.NANOSCALE,6(1),371-377.
MLA Zhang, Zailei,et al."Growth of linked silicon/carbon nanospheres on copper substrate as integrated electrodes for Li-ion batteries".NANOSCALE 6.1(2014):371-377.
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