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SiO2@C hollow sphere anodes for lithium-ion batteries
Liu, Xuelian; Chen, Yuxi; Liu, Hongbo; Liu, Zhi-Quan; Chen, YX (reprint author), Hunan Univ, Hunan Prov Key Lab Spray Deposit Technol & Applic, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.
2017-03-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume33Issue:3Pages:239-245
AbstractAs anode materials for lithium-ion batteries, SiO2 is of great interest because of its high capacity, low cost and environmental affinity. A facile approach has been developed to fabricate SiO2@C hollow spheres by hydrolysis of tetraethyl orthosilicate (TEOS) to form SiO2 shells on organic sphere templates followed by calcinations in air to remove the templates, and then the SiO2 shells are covered by carbon layers. Electron microscopy investigations confirm hollow structure of the SiO2@C. The SiO2@C hollow spheres with different SiO2 contents display gradual increase in specific capacity with discharge/charge cycling, among which the SiO2@C with SiO2 content of 67 wt% exhibits discharge/charge capacities of 653.4/ 649.6 mA h g(-1) over 160 cycles at current density of 0.11 mA cm(-2). The impedance fitting of the electrochemical impedance spectroscopy shows that the SiO2@C with SiO2 content of 67 wt% has the lowest charge transfer resistance, which indicates that the SiO2@C hollow spheres is promising anode candidate for lithium-ion batteries. Copyright (C) 2017, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited.; As anode materials for lithium-ion batteries, SiO2 is of great interest because of its high capacity, low cost and environmental affinity. A facile approach has been developed to fabricate SiO2@C hollow spheres by hydrolysis of tetraethyl orthosilicate (TEOS) to form SiO2 shells on organic sphere templates followed by calcinations in air to remove the templates, and then the SiO2 shells are covered by carbon layers. Electron microscopy investigations confirm hollow structure of the SiO2@C. The SiO2@C hollow spheres with different SiO2 contents display gradual increase in specific capacity with discharge/charge cycling, among which the SiO2@C with SiO2 content of 67 wt% exhibits discharge/charge capacities of 653.4/ 649.6 mA h g(-1) over 160 cycles at current density of 0.11 mA cm(-2). The impedance fitting of the electrochemical impedance spectroscopy shows that the SiO2@C with SiO2 content of 67 wt% has the lowest charge transfer resistance, which indicates that the SiO2@C hollow spheres is promising anode candidate for lithium-ion batteries. Copyright (C) 2017, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited.
description.department[liu, xuelian ; chen, yuxi ; liu, hongbo] hunan univ, hunan prov key lab spray deposit technol & applic, coll mat sci & engn, changsha 410082, hunan, peoples r china ; [liu, zhi-quan] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china
KeywordSilica Hollow Spheres Carbon Coating Anode Lithium-ion Batteries
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51472083]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78259
Collection中国科学院金属研究所
Corresponding AuthorChen, YX (reprint author), Hunan Univ, Hunan Prov Key Lab Spray Deposit Technol & Applic, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.
Recommended Citation
GB/T 7714
Liu, Xuelian,Chen, Yuxi,Liu, Hongbo,et al. SiO2@C hollow sphere anodes for lithium-ion batteries[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2017,33(3):239-245.
APA Liu, Xuelian,Chen, Yuxi,Liu, Hongbo,Liu, Zhi-Quan,&Chen, YX .(2017).SiO2@C hollow sphere anodes for lithium-ion batteries.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,33(3),239-245.
MLA Liu, Xuelian,et al."SiO2@C hollow sphere anodes for lithium-ion batteries".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 33.3(2017):239-245.
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