Acta Chimica Sinica ›› 2000, Vol. 58 ›› Issue (10): 1226-1229. Previous Articles     Next Articles

Original Articles

有序中孔纳米多晶TiO~2薄膜的Li^+嵌脱行为

傅正文;罗骞;张伟;赵东元;秦启宗   

  1. 复旦大学化学系.上海(200433)
  • 发布日期:2000-10-15

Electrochemical property of ordered mesoporous TiO~2 films

Fu Zhengwen;Luo Qian;Zhang Wei;Zhao Dongyuan;Qin Qizong   

  1. Fudan Univ, Dept Chem.Shanghai(200433)
  • Published:2000-10-15

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

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