期刊
NANOSCALE RESEARCH LETTERS
卷 7, 期 -, 页码 1-6出版社
SPRINGEROPEN
DOI: 10.1186/1556-276X-7-10
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资金
- National Research Foundation of Korea (NRF)
- Korean government (MEST) [2010-0029617, 2011-0005776]
- Ajou University [S-2011-G0001-00070]
- National Research Foundation of Korea [2010-0002533, 2009-0094046] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
One of the most promising anode materials for Li-ion batteries, Li4Ti5O12, has attracted attention because it is a zero-strain Li insertion host having a stable insertion potential. In this study, we suggest two different synthetic processes to prepare Li4Ti5O12 using anatase TiO2 nanoprecursors. TiO2 powders, which have extraordinarily large surface areas of more than 250 m(2) g(-1), were initially prepared through the urea-forced hydrolysis/precipitation route below 100A degrees C. For the synthesis of Li4Ti5O12, LiOH and Li2CO3 were added to TiO2 solutions prepared in water and ethanol media, respectively. The powders were subsequently dried and calcined at various temperatures. The phase and morphological transitions from TiO2 to Li4Ti5O12 were characterized using X-ray powder diffraction and transmission electron microscopy. The electrochemical performance of nanosized Li4Ti5O12 was evaluated in detail by cyclic voltammetry and galvanostatic cycling. Furthermore, the high-rate performance and long-term cycle stability of Li4Ti5O12 anodes for use in Li-ion batteries were discussed.
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