期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 465, 期 1-2, 页码 375-379出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2007.10.113
关键词
Electrode; Energy storage; Crystal structure; Transport property; Kinetics
资金
- 100 Talents Program of Academia Sinica
- National Science Foundation of China [20471057]
- China Education Ministry [2003035057]
The electrochemical behavior of Li1.33Ti1.67O4 was investigated as an anode material discharged to 0 V using X-ray diffraction (XRD), galvanostatic cell cycling and ac impedance spectroscopy. The XRD results indicate that the lattice framework of Li1.33Ti1.67O4 is almost unchanged even after it is discharged to 0 V. The Li1.33Ti1.67O4 electrode can be cycled in the voltage range between 0 and 3.0 V with excellent cyclability and a capacity of about 200 mAh/g. During the discharge process, a 0.75 V plateau is also observed in addition to the usual 1.5 V plateau. The capacity associated with the 0.75 V plateau varies with current density and temperature. The possible cause of this low potential plateau is discussed and attributed to a carbon-triggered-capacity (CTC) effect. (C) 2007 Elsevier B.V. All rights reserved.
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