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Synthesis and electrochemical performance of high-rate dual-phase Li4Ti5O12–TiO2 nanocrystallines for Li-ion batteries
- Source :
-
Electrochimica Acta . Jan2013, Vol. 87, p218-223. 6p. - Publication Year :
- 2013
-
Abstract
- Abstract: Dual-phase Li4Ti5O12–TiO2 nanocrystallines are prepared by a hydrothermal process and subsequent heat treatment. The as-prepared Li4Ti5O12–TiO2 nanocrystallines measure around 15–25nm in size and have abundant phase interfaces. Electrochemical measurements demonstrate that dual-phase Li4Ti5O12–TiO2 exhibit good electrochemical performance over individual single-phase Li4Ti5O12, especially at high current rates. Initial discharge capacities of dual-phase Li4Ti5O12–TiO2 nanocrystallines are 241 and 202mAhg−1 at discharge rates of 0.2 and 5C, respectively. Even after 50 cycles at 20C, the capacity still remains 140mAhg−1, which is four times greater than that of single-phase Li4Ti5O12 (29mAhg−1). The high electrochemical performance indicates that dual-phase Li4Ti5O12–TiO2 nanocrystallines are highly promising anode materials for lithium ion battery applications. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00134686
- Volume :
- 87
- Database :
- Academic Search Index
- Journal :
- Electrochimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 84765458
- Full Text :
- https://doi.org/10.1016/j.electacta.2012.09.010