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https://irlib.pccu.edu.tw/handle/987654321/24182
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| 題名: | Core-Shelled MCMB-Li4Ti5O12 Anode Material for Lithium-ion Batteries |
| 作者: | Lee, ML (Lee, Meng-Lun)
Liao, SC (Liao, Shih-Chieh)
Chen, JM (Chen, Jing-Ming)
Yeh, JW (Yeh, Jien-Wei)
Shih, HC (Shih, Han C.) |
| 貢獻者: | Inst Mat Sci & Nanotechnol |
| 關鍵詞: | Lithium-ion battery
Li4Ti5O12
Graphite
MCMB |
| 日期: | 2012-10 |
| 上傳時間: | 2013-02-19 14:29:40 (UTC+8) |
| 摘要: | In this study, we have synthesized and characterized Li4Ti5O12 (LTO)-coated meso-carbon micro beads (MCMB) as an anode material for Li-batteries. The surface of MCMB powders was uniformly coated by the LTO nanoparticles to form a core-shell structure via a sol-gel process, followed by calcination. The average size of MCMB core was 15 mu m while the thickness of LTO shell was 80 to 120 nm. We found that LTO-coated MCMB had better rate-capability and cycle life, compared with the pristine MCMB. Electro-chemical impedance spectroscopy (EIS) results showed that after 40 cycles, the cell resistance of the LTO-coated MCMB electrode increased slightly, while that of the pristine MCMB electrode increased significantly. The enhanced performance of the LTO-coated MCMB electrode is attributed to the LTO coating, which suppresses the increase in the charge-transfer resistance during prolonged cycle. |
| 關聯: | JOURNAL OF THE CHINESE CHEMICAL SOCIETY 卷: 59 期: 10 頁數: 1206-1210 |
| 顯示於類別: | [化學工程與材料工程學系暨碩士班] 期刊論文
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