標題: Process and properties of the carbon nanotube assisted LiCoO2 thin-film battery electrode by pulsed laser deposition
作者: Lo, An-Ya
Sun, Chuan-Shu
Tseng, Wen-Shou
Kuo, Cheng-Tzu
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: carbon nanotubes;electrochemical electrodes;lithium compounds;pulsed laser deposition;secondary cells
公開日期: 1-Nov-2009
摘要: In this study, a pulsed laser deposition process was developed to deposit a carbon nanotube (CNT) assisted LiCoO2 electrode to improve its power density. The electrodes were deposited on Pt-coated Si substrates with Ar and O-2 as sputtering gases and LiCoO2+C as the target. The results indicate that the working pressure is the most important parameter to control the composition of the electrode. Therefore, electrodes with a three-layer structure (i.e., LiCoO2-rich/CNT-rich/LiCoO2-rich) were fabricated by a three-step deposition process by varying the pressures from 13 to 1.3x10(4) Pa and then 13 Pa again, and it was found that the charge/discharge capacity became approximately 1.5 times greater than that in the corresponding electrode without a CNT-rich layer. The results also indicate that a higher substrate temperature is favorable for improving the crystallinity of the electrode to approach LiCoO2 crystals.
URI: http://dx.doi.org/10.1116/1.3264678
http://hdl.handle.net/11536/149863
ISSN: 1071-1023
DOI: 10.1116/1.3264678
期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
Volume: 27
Issue: 6
起始頁: 3067
結束頁: 3072
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