Abstract: Three lithium titanium composite oxides were prepared from different TiO2, and the electrochemical performance of the composite oxides was tested. The results proved that, Li4Ti5O12 prepared from nanocrystalline titanium dioxide showed a good lithiation performance. The reversible capacity of the material was more than 95 mA•h•g－1, the charge-discharge efficiency was almost 100％ and the cyclic performance was good. When the lithium intercalation≥85％ or the lithium extraction≥90％, its charge potential or discharge potential would change quickly. This Li4Ti5O12 is good candidate material of negative electrode for lithium-ion battery.

Key words: Nanocrystalline TiO₂, Heat-treating, Li₄Ti₅O₁₂, Lithiation inserting performance