关键词: 二氧化钛, 薄膜, 纳米相材料, 锂离子, 循环伏安法, 嵌入反应

Ordered mesoporous TiO~2 films with high surface area and narrow pore size distribution have been synthesized by using triblock copolymer as the structure-directing agent in nonaqueous media. electrochemical properties of mesoporous anatase TiO~2 films have been studied by using cyclic voltammogram and potential step techniques. Large Li^+ insertion capacitity was observed by cyclic voltammogram, and the double-layer capacitance has significant effect on cyclic voltammogram curves. The charge transfer coefficient is in the range of 0.15～0.4 for Li^+ extraction, and the diffusion coefficient is estimated to be in the range of (4.71～55.8)×10^-^1^2 cm^2/s. These results show that the electrochemical properties of Li^+ ion insertion of mesoporous anatase TiO~2 films with high surface area are different from those of normal TiO~2 films prepared without surfactant.

Key words: TITANIUM DIOXIDE, THIN FILMS, NANOPHASE MATERIALS, LITHIUM ION, CYCLOVOLTAMGRAPH, INTERCALATION REACTION