Abstract
The thermal annealing effect on the morphological, structural and electrochemical properties of hydrothermal synthesized Li4Ti5O12 / TiO2 has been studied. Lithium titanate (Li4Ti5O12) nanopowders are successfully synthesized by hydrothermal method using titanuim tetrabutyl and lithium hydroxide followed by thermal annealing process at different temperatures: 500 °C, 800 °C and 900 °C. The X-ray diffraction (XRD) patterns indicates the appearance of the Li4Ti5O12 phase at a temperature above 800 °C formed after the reaction of the two phases: TiO2 and Li2TiO3 which appear at 500 °C. Though, the prepared electrode by the powder annealed at 800 °C shows an initial capacity of about 173.1 mAh g−1 (0.1 C), which retained at 75.6 mAh g−1 after 100 cycles.
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