Structure and Electrochemical Properties of Spinel Li4Ti5O12 Nanocomposites as Anode for Lithium-Ion Battery
文献类型：期刊论文
| 作者 | Sun, XC ; Hegde, M ; Zhang, YF ; He, M ; Gu, L ; Wang, YQ ; Shu, J ; Radovanovic, PV ; Cui, B |
| 刊名 | INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
 |
| 出版日期 | 2014 |
| 卷号 | 9期号:4页码:1583 |
| 关键词 | Lithium-ion battery Li4Ti5O12 X-ray diffraction electron microscopy amorphous coating lithium insertion/extraction |
| ISSN号 | 1452-3981 |
| 通讯作者 | Sun, XC (reprint author), Univ Waterloo, Dept Elect & Comp Engn, Waterloo, ON N2L 3G1, Canada. |
| 中文摘要 | Nanocomposite particles of amorphous carbon-Li4Ti5O12 (C-LTO) and carbon nanotube-Li4Ti5O12 (CNT-LTO) were synthesized by solvothermal method and subsequent high-temperature calcination. X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), and selected area electron diffraction (SAED) were applied to characterize the phase structure, particle morphology, and the coating structure. XRD analysis, TEM micrographs, HR-TEM images and SAED analysis revealed that both LTO particles exhibited a well-developed spinel nanocrystal structure with average sizes between 20-70 nm. The C-LTO particles exhibited roughly spherical shape coated by an amorphous carbon layer up to 10 nm in thickness. The CNT-LTO samples showed uniform square nanocrystals with edge length around 20 nm and nanoscale graphitic layers covering the surface, revealing the carbon nanotubes interconnection networks among the particle assemblies. Electrochemical studies of lithium insertion/extraction performance are evaluated by the galvanostatic charge/discharge tests, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Both LTO particles showed the superior initial discharge capacity of more than 200 mAh/g at 1/10C rate. The irreversible capacity of the C-LTO particles at more cycles was due to large polarization resulted from excessive carbon and possible residual precursors. The CNT-LTO particles show larger reversible capacity and enhanced electrochemical Li+ insertion/extraction kinetics at different cycling rates. The comparative structural and electrochemical analyses demonstrated that both nanoscale graphitic covering layers and the CNT interconnection networks increase the electronic conductivity and improve the kinetics rates of lithium insertion/extraction in the CNT-LTO particles. |
| 资助信息 | University of Waterloo; Natural Sciences and Engineering Research Council of Canada (NSERC); Waterloo Institute for Nanotechnology (WIN); Beijing Nova Program [2010B008]; Beijing Natural Science Foundation [2132014] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59109]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Sun, XC,Hegde, M,Zhang, YF,et al. Structure and Electrochemical Properties of Spinel Li4Ti5O12 Nanocomposites as Anode for Lithium-Ion Battery[J]. INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,2014,9(4):1583. |
| APA | Sun, XC.,Hegde, M.,Zhang, YF.,He, M.,Gu, L.,...&Cui, B.(2014).Structure and Electrochemical Properties of Spinel Li4Ti5O12 Nanocomposites as Anode for Lithium-Ion Battery.INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,9(4),1583. |
| MLA | Sun, XC,et al."Structure and Electrochemical Properties of Spinel Li4Ti5O12 Nanocomposites as Anode for Lithium-Ion Battery".INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE 9.4(2014):1583. |
入库方式： OAI收割
来源：物理研究所
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