Fabregat-Santiago Francisco, Randriamahazaka Hyacinthe, Zaban Arie, Garcia-Cañadas Jorge, Garcia-Belmonte G, Bisquert Juan
Departament de Ciències Experimentals, Universitat Jaume I, 12071 Castelló, Spain.
Phys Chem Chem Phys. 2006 Apr 21;8(15):1827-33. doi: 10.1039/b600452k. Epub 2006 Mar 28.
The electrochemical behaviour of nanoporous TiO(2) in a room temperature ionic liquid (RTIL), 1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)amide (EMITFSI), was investigated by cyclic voltammetry (CV) and impedance spectroscopy. Exponentially rising currents in voltammetry were attributed to the charging/discharging of electrons in the TiO(2) film and a charge transfer mechanism. The main features of the voltammetry and impedance followed the same trends in the ionic liquid as in other organic solvents and also in aqueous electrolytes. In the presence of lithium ions, the onset potential of the charge accumulation increased due to the change of the initial position of the TiO(2) conduction band. The results show that substitution of organic solvents contained in solar cells, supercapacitors or other electrochemical devices is in general feasible, though requires some adjustment in the electrolyte composition for optimal performance.
通过循环伏安法（CV）和阻抗谱研究了纳米多孔TiO₂在室温离子液体（RTIL）1-乙基-3-甲基咪唑双（（三氟甲基）磺酰基）酰胺（EMITFSI）中的电化学行为。伏安法中电流呈指数上升归因于TiO₂薄膜中电子的充电/放电以及电荷转移机制。伏安法和阻抗的主要特征在离子液体中与在其他有机溶剂以及水性电解质中遵循相同的趋势。在存在锂离子的情况下，由于TiO₂导带初始位置的变化，电荷积累的起始电位增加。结果表明，用离子液体替代太阳能电池、超级电容器或其他电化学装置中所含的有机溶剂总体上是可行的，不过需要对电解质组成进行一些调整以实现最佳性能。
