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Porous TiO2 Electrodes Prepared By a Rapid Pyro-Synthesis for Advanced Lithium-Ion Batteries

Thursday, 23 June 2016
Riverside Center (Hyatt Regency)
V. Mathew, J. Gim, Y. Oh, M. H. Alfaruqi, J. Song, S. Kim, J. Jo, T. Vu Thi, S. Kim, S. Lee, and J. Kim (Chonnam National University)
In this study, anatase-type titanium dioxide (TiO2) anodes were prepared by a polyol-assisted pyro-synthetic process followed by mild annealing in the range of 300 to 600 °C. The XRD studies confirmed the formation of anatase-type TiO2 and the Scherrer formula aided in establishing the average crystallite size to be less than 50 nm for all of the prepared samples. Electron microscopy studies revealed the average particle-size to be in the range between 5 and 50 nm whereas the adsorption studies demonstrated the mesoporous characteristics of all the prepared samples and the 500 °C electrode, in particular, exhibited tri-porosity. This unique tri-porous feature in combination with the sufficiently high particle crystallinity appears to contribute to the impressive electrochemical lithium storage (154.7 and 116.4 mAh g-1 at 3.2 and 6.4 C, respectively) in the 500 °C electrode. Furthermore, the pyro-synthetic strategy aids in developing nanostructured battery electrodes with porous morphologies and appears promising to be developed as an energy saving process for large-scale applications.