氧化还原活性离子液体中的超高效导电
Extraordinarily Efficient Conduction in a Redox-Active Ionic Liquid
摘要：
碘添加到碘化物基离子液体导致非常有效的电荷传输，大大超过预期的这种粘性系统。使用太赫兹时域光谱，结合直流电导率，扩散率和粘度测量，我们解开1-甲基-3-丙基咪唑碘化盐熔体的导电途径。这项研究提供了证据的Grotthuss机制作为一个重要的贡献者的导电性，并提供了新的见解离子配对过程以及形成的聚碘化物。的太赫兹和运输结果团聚在一个模型中提供了一个定量的描述的物理扩散和Grotthuss键交换过程的传导。这些新的结果是重要的基本理解的熔融盐中的导电和离子液体被用作电荷传输介质，如在电池和染料敏化太阳能电池的应用。
英文摘要：
Iodine added to iodide-based ionic liquids leads to extraordinarily efficient charge transport, vastly exceeding that expected for such viscous systems. Using terahertz time-domain spectroscopy, in conjunction with dc conductivity, diffusivity and viscosity measurements we unravel the conductivity pathways in 1-methyl-3-propylimidazolium iodide melts. This study presents evidence of the Grotthuss mechanism as a significant contributor to the conductivity, and provides new insights into ion pairing processes as well as the formation of polyiodides. The terahertz and transport results are reunited in a model providing a quantitative description of the conduction by physical diffusion and the Grotthuss bond-exchange process. These novel results are important for the fundamental understanding of conduction in molten salts and for applications where ionic liquids are used as charge-transporting media such as in batteries and dye-sensitized solar cells.
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