SYNTHESIS OF TWO DIMENSIONAL TiO2 NANOCRYSTALS FOR HIGH POWER LITHIUM ION BATTERY ANODE MATERIALS

摘要

Lithium ion battery (LIB) has remarkably developed as energy suppliers for portable electronic devices and electric vehicles. ' In particular, the electrode materials of LIB have widely researched to increase energy and power density. High power materials including olivine phosphate materials, Li4Ti5O_(12), and anatase TiO2 have attracted considerable attention. Anatase TiO2 is one of the most fascinating materials as an anode material for LIB, expecting a high rate performance because it can provide accommodations for small foreign ions such as Li~+ and H~+, through insertion mechanism. Various shape of titania was studied as an anode material to improve the rate capability. 2-dimensional (2D) anisotropic structure is one of the intriguing structure because it can be shortened the diffusion length of the active materials in the crystal interior. Although 2D metal oxides nanocrystals are standing as a potential candidate for the electrodes, there are a few reports about general synthesis and electrochemical application of the 2-dimensional (2D) structured titania nanocrystals.6