Titanium dioxide has attracted much research interests in lithium ion battery (LIB) field because of its low cost, abundance, non-toxicity and good chemical stability. And among various TiO2 nano-architecture, there have been much efforts on synthesis of two-dimensional TiO2, because of unusual high capacity of 2-dimensional TiO2 for LIBs. 2-dimensional TiO2 could possess high surface area and short diffusion length and thus could favor fast insertion/extraction of Li ions. However, typical synthetic methods for 2-dimensional TiO2 such as hydrothermal process suffer from high temerature/pressure condition, and long synthetic time. Therefore, in practical point of view, more simple and less energy costing approach for 2-dimensional TiO2 is necessary. In this study, we synthesized two-dimensional TiO2 through a novel and simple sol-gel method at room temperature in short time. The synthesis of two-dimensional TiO2 was achieved by inducing the sol-gel reaction at the interface between organic solvent and ice. The synthesized 2-dimensional TiO2 nanodisk had thickness of 0.5~1 nm and diameter of 5~20 nm. Formation of ultrathin two-dimensional TiO2 was confirmed by direct observation of the two-dimensional structure in the field-emission scanning electron microscopy (FE-SEM) images. The synthesized TiO2 nanodisk electrode exhibited high Li ion charge/discharge capacities and excellnt rate performance.

Interfacial synthesis of 2D TiO<sub>2</sub> nanodisk for Li-ion batteries

246th National Meeting (2013)

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Interfacial synthesis of 2D TiO2 nanodisk for Li-ion batteries

Interfacial synthesis of 2D TiO₂ nanodisk for Li-ion batteries