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Growth of silicon/carbon microrods on graphite microspheres as improved anodes for lithium-ion batteries
Zhu, Xiaoyi1,2; Chen, Han2; Wang, Yanhong2; Xia, Linhua1; Tan, Qiangqiang2; Li, Hong3; Zhong, Ziyi4; Su, Fabing2; Zhao, X. S.1,5
AbstractWe report a facile chemical vapor deposition (CVD) method to grow silicon/carbon (Si/C) microrods on the surface of commercial graphite microspheres (GMs) to prepare Si/C/GM composite materials as Li-ion battery anodes. Dimethyldichlorosilane and toluene were used as Si and C precursors, respectively. The CVD temperature and time, as well as the mechanism of materials growth were investigated. The samples were characterized by using X-ray diffraction, thermogravimetric analysis, X-ray photoelectron spectroscopy, Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy. It was found that the obtained Si/C/GM composites with an urchin-like morphology are composed of Si particles, amorphous carbon, and graphite. The CVD conditions have a significant impact on the morphology and electrochemical performance of the composite materials. The composite prepared under the optimum CVD conditions, namely at 900 degrees C for 5 h, displayed the best anode properties with a specific capacity of 562.0 mA h g(-1) at a current density of 50 mA g(-1), much higher than that of GMs (361.0 mA h g(-1)), and a good cycling performance (i. e., a reversible capacity of 590.5 mA h g(-1) after 50 cycles). The improved electrochemical performance is attributed to the incorporation of Si, together with the formation of a Si/C microrod network, which connects the GMs and buffers the volume change of Si during lithium ion insertion/extraction. The work provides a simple and low-cost route to enhance the performance of commercial graphite anode materials for Li-ion batteries.
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
Indexed BySCI
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000315968900012
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Cited Times:54[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Qingdao Univ, Coll Chem & Environm Engn, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
4.ASTAR, Inst Chem Engn & Sci, Singapore 627833, Singapore
5.Univ Queensland, Sch Chem Engn, St Lucia, Qld 4072, Australia
Recommended Citation
GB/T 7714
Zhu, Xiaoyi,Chen, Han,Wang, Yanhong,et al. Growth of silicon/carbon microrods on graphite microspheres as improved anodes for lithium-ion batteries[J]. JOURNAL OF MATERIALS CHEMISTRY A,2013,1(14):4483-4489.
APA Zhu, Xiaoyi.,Chen, Han.,Wang, Yanhong.,Xia, Linhua.,Tan, Qiangqiang.,...&Zhao, X. S..(2013).Growth of silicon/carbon microrods on graphite microspheres as improved anodes for lithium-ion batteries.JOURNAL OF MATERIALS CHEMISTRY A,1(14),4483-4489.
MLA Zhu, Xiaoyi,et al."Growth of silicon/carbon microrods on graphite microspheres as improved anodes for lithium-ion batteries".JOURNAL OF MATERIALS CHEMISTRY A 1.14(2013):4483-4489.
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