Nonlinear ion transport in glass-forming ionic liquids: Higher harmonic ac currents and electrical creep

玻璃形成离子液体中的非线性离子传输：高次谐波交流电流和电蠕变

• 批准号: 173396901
• 负责人: Professor Dr. Bernhard Roling
• 金额: --
• 依托单位: Arbeitsgruppe Roling
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/173396901?language=en
• 关键词: Nonlinear; ion; transport; glass; forming

The nonlinear ionic conductivity of supercooled ionic liquids and of their mixtures with molecular liquids shall be studied by measuring higher-harmonic currents after applying high ac electric fields. In order to generate fields above 100 kV/cm, different electrode configurations will be set up and tested. In mixtures with small amounts of ionic liquid, the nonlinear dynamics of quasi-independent ions will be probed. With increasing ion concentration, interactions between the probe ions will become more and more relevant. A detailed comparison will be drawn between our experimental results and the theoretical results obtained in other projects. In particular, theoretical predictions about the shrinkage of the linear response regime close to the glass transitions will be tested. The aim is to gain new insights into the force-dependent subdiffusive and diffusive ion dynamics during vitrification.

过冷离子液体及其与分子液体的混合物的非线性离子电导率应通过施加高交流电场后测量高次谐波电流来研究。为了产生100 kV/cm以上的电场，将设置不同的电极配置并进行测试。在含有少量离子液体的混合物中，将探讨准独立离子的非线性动力学。随着离子浓度的增加，探针离子之间的相互作用将变得越来越重要。我们的实验结果将与其他项目的理论结果进行详细的比较。特别是，关于接近玻璃化转变的线性响应收缩的理论预测将被测试。目的是在玻璃化过程中获得力依赖的亚扩散和扩散离子动力学的新见解。