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Solvothermal Synthesis Of Electrochemically Active Nanocrystalline Li-Ti-O Spinel

Published online by Cambridge University Press:  15 March 2011

Dina Fattakhova  and
Petr Krtil
Dina Fattakhova
Affiliation:
J. Heyrovsky Institute of Physical Chemistry, Dolejskova 3, 18223 Prague, Czech Republic Valery Petrykin
Petr Krtil
Affiliation:
Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta, Midori, 4259 Yokohama, Japan
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Abstract

Nanocrystalline Li-Ti-O spinel samples were prepared by solvothermal reaction of TiO2 with lithium hydroxide in water and ethanol. The hydrothermal reaction proceeds at temperature higher than 130 °C. The reaction proceeds via dissolution-precipitation mechanism and its course is not sensitive to titanium dioxide polymorph used in the reaction. Product of the reaction in water has cubic rock salt type structure. It converts, however, to spinel if annealed to temperatures exceeding 250 °C. The re-crystallization is accompanied with water removal from the structure. Solvothermal reaction in ethanol leads directly to a product with spinel structure without need for annealing. Both products are active for Li insertion; theelectrochemical activity. The specific capacity ranges between 100 and 160 mAh/g depending on the annealing temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 703: Symposia U/V – Nanophase and Nanocomposite Materials IV , 2001 , V3.26
Copyright
Copyright © Materials Research Society 2002

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References

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