论文部分内容阅读
以三嵌段高分子非离子表面活性剂为结构导向剂,在非水条件下,合成了具有均一孔径分布(6.5nm)、高比表面积的稳定的中孔纳米多晶TiO_2薄膜.用循环伏安与电位阶跃技术研究了薄膜的Li~+离子嵌入反应.结果表明,由非离子表面活性剂导向而成的中孔TiO_2薄膜具有较大的Li~+离子嵌入容量,伏安特性中双电层电容效应非常显著,Li~+离子在脱嵌过程中电荷传递系数在0.15～0.4之间,嵌入系数为(4.7～55)×10~(-12)cm~2/s.这些结果显示了具有大的比表面中孔TiO_2薄膜具有不同一般Li~+离子嵌入TiO_2薄膜的电化学反应特征.
A stable mesoporous nano-polycrystalline TiO_2 film with uniform pore size distribution (6.5nm) and high specific surface area was synthesized under non-aqueous conditions using triblock polymer nonionic surfactant as the structural directing agent. The results show that the mesoporous TiO_2 thin films doped with nonionic surfactant have a large insertion capacity of Li + ions, and the voltammetric properties of the double The effect of electric layer capacitance is very remarkable. The charge transfer coefficient of Li ~ + ions in the process of deintercalation is between 0.15 ~ 0.4 and the embedding coefficient is (4.7 ~ 55) × 10 ~ (-12) cm ~ 2 / s. A large specific surface mesoporous TiO_2 film has the electrochemical reaction characteristics of different general Li ~ + ions embedded in the TiO_2 film.