| 초록 |
Since Li4Ti5O12 (LTO) electrodes are usually synthesized by the reaction of TiO2 powders and Li2CO3, we expected that anodically prepared TiO2 film is a good starting material for the fabrication of thickness-controllable LTO film. In this study, uniform thickness of LTO films, which can be precisely adjusted by reaction conditions, are prepared by simple reaction of anodic TiO2 nanotubes with different lengths and various concentrations of Li2CO3. The results show that the anodic TiO2 nanotubes allow the formation of Li4Ti5O12 on Ti foil without any binder, conductive agent or pressing process. The maximum discharge capacity of the formed film at the first cycle is 104 μAh cm-2, which corresponds to 103 mAh g-1. We found that the binder-free LTO shows extremely high capacity per interfacial area due to no foreign ingredients such as binder and conductive agents, even though the capacity per gram of binder-free LTO is not greater than that of conventional binder-contained LTO in current stage. |
