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 -12cm 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.
|Translated title of the contribution
|Electrochemical property of ordered mesoporous TiO 2 films
|Number of pages
|Acta Chimica Sinica
|Published - 1 Dec 2000
- Li insertion/extraction
- TiO films