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https://irlib.pccu.edu.tw/handle/987654321/26649
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| 题名: | Li4Ti5O12-coated graphite anode materials for lithium-ion batteries |
| 作者: | Lee, ML (Lee, Meng-Lun)
Li, YH (Li, Yu Han)
Liao, SC (Liao, Shih-Chieh)
Chen, JM (Chen, Jin-Ming)
Yeh, JW (Yeh, Jien-Wei)
Shih, HC (Shih, Han C.) |
| 贡献者: | Inst Nanomat, Dept Chem Engn & Mat Engn |
| 关键词: | Lithium-ion battery
Graphite
Li4Ti5O12
High temperature |
| 日期: | 2013-12-01 |
| 上传时间: | 2014-02-21 13:34:33 (UTC+8) |
| 摘要: | In this study, we synthesized and characterized Li4Ti5O12(LTO)-coated graphite as an anode material for Li-batteries. The surface of graphite powders was uniformly coated by the LTO nanoparticles to form a core-shelled structure via a sol-gel process, followed by calcination. The average size of graphite core was 20 mu m while the thickness of LTO shell was 60 nm to 100 nm. We found that LTO-coated graphite has better rate-capability and cycle life at RT and 55 degrees C, compared with the pristine graphite. The electrochemical impedance spectroscopy (EIS) results of the cell with LTO-coated graphite anode showed a significant suppression of the impedance rise after 60 cycles. In addition, the Raman spectrum showed that after 60 charge-discharge cycles at 55 degrees C, the I-D/I-G ratio of the LTO-coated graphite electrode increased slightly, while that of the pristine graphite electrode increased significantly. The batteries with LTO-coated graphite anode exhibited excellent cyclic ability and high temperature performance. (C) 2013 Elsevier Ltd. All rights reserved. |
| 關聯: | ELECTROCHIMICA ACTA Volume: 112 Pages: 529-534 Published: DEC 1 2013 |
| 显示于类别: | [化學工程與材料工程學系暨碩士班] 期刊論文
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