Structure and dynamics ofthe interfacial layer between ionic liquids and electrode materials

离子液体与电极材料界面层的结构和动力学

• 批准号: 186902953
• 负责人: Professor Dr. Frank Endres
• 金额: --
• 依托单位: Institut für Elektrochemie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 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/186902953?language=en
• 关键词: Structure; dynamics; ofthe; interfacial; layer

The structure and dynamics of the interfacial layer between ionic liquids and varying electrode materials plays a major role for applications in the fields of electrochemical energy storage and metal deposition. However, until now neither the experimental characterisation of this interfacial layer nor its theoretical understanding has reached a satisfactory level. In this project, the interfacial layer between selected ionic liquids with highest purity and selected electrode materials (Pt, Au) will be analysed using different experimental methods. At first, the method of electrochemical impedance spectroscopy will be combined with STM and AFM methods. Later on, MIES and SFG will be used in addition. The aim is to distinguish between electrostatic double layer formation and adsorption processes, the latter inducing pseudocapacitive charge storage. The influence of slow adsorption processes on the faster double layer dynamics is to be analysed in detail. Eventually, information about the influence of temperature and dissolved lithium salts will be gained. The project ought to deliver reliable data on very pure and well characterised ionic liquids and thereby contribute to the further development of the existing double layer / interfacial layer theories.

离子液体与不同电极材料之间的界面层的结构和动力学在电化学储能和金属沉积领域具有重要的应用价值。然而，到目前为止，无论是对这种界面层的实验表征，还是对它的理论理解都没有达到令人满意的水平。在本项目中，将用不同的实验方法分析选定的高纯度离子液体与选定的电极材料(铂、金)之间的界面层。首先，将电化学阻抗谱方法与扫描隧道显微镜和原子力显微镜相结合。稍后，还将使用Mies和SFG。其目的是区分静电双电层的形成和吸附过程，后者引起假电容电荷存储。详细分析了慢吸附过程对较快双分子层动力学的影响。最终，关于温度和溶解的锂盐的影响的信息将被获得。该项目应能提供关于非常纯净和特性良好的离子液体的可靠数据，从而有助于进一步发展现有的双层/界面层理论。