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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
发表期刊JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
卷号33期号:3页码:239-245
摘要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.; 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.
部门归属[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
关键词Silica Hollow Spheres Carbon Coating Anode Lithium-ion Batteries
学科领域Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者National Natural Science Foundation of China [51472083]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78259
专题中国科学院金属研究所
通讯作者Chen, YX (reprint author), Hunan Univ, Hunan Prov Key Lab Spray Deposit Technol & Applic, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.
推荐引用方式
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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