Lithium-doped rotator phases as ion conducting electrolytes

作为离子导电电解质的锂掺杂旋转相

• 批准号: 429918288
• 负责人: Professor Dr. Roland Böhmer
• 金额: --
• 依托单位: Lehrstuhl für Experimentelle Physik III
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/429918288?language=en
• 关键词: Lithium; doped; rotator; phases; ion

Numerous current research activities aim at developing efficient Lithium containing energy storage materials. In addition to a high electrical conductivity these materials should feature good mechanical stability. Ionically doped succinonitrile-based solid-state electrolytes are promising in this respect. The rotator phase succinonitrile, in mixed crystals with glutaronitrile, is characterized by fast reorientational molecular motions. So far, in these systems the rotation-translation-coupling and deviations thereof were examined mostly using impedance spectroscopy. To elucidate the molecular and ionic dynamics of these electrolytes on a microscopic level, this project focuses on the application of magnetic resonance techniques: Here, deuteron NMR is well suited to investigate the crystalline matrix and lithium NMR provides a sensitive probe of the mobile charge carriers. By combining spin relaxometry, multidimensional spectroscopy, and diffusometry, the interplay of molecular and ionic jump processes will be elucidated with the goal to gain new insights into the emergence of high ionic conductivities as well as into the role of local-field, correlation, and association effects in solid electrolytes.

当前的许多研究活动旨在开发有效的含锂含量储能材料。除了高电导率外，这些材料还应具有良好的机械稳定性。在这方面，基于离子掺杂的氧化氧化固定物固态电解质有希望。旋转剂相的琥珀诺酯，在带有谷戊腈的混合晶体中，以快速的重新定位分子运动为特征。到目前为止，在这些系统中，主要使用阻抗光谱法检查了旋转翻译耦合及其偏差。为了阐明这些电解质在显微镜水平上的分子和离子动力学，该项目的重点是磁共振技术的应用：这里，Deuteron NMR非常适合研究结晶基质和NMR LITHIUM NMR提供了移动电荷载体的敏感探针。通过结合自旋松弛测定，多维光谱和扩散测定法，将阐明分子和离子跳跃过程的相互作用，目的是获得对高离子电导率的新见解，以及局部磁场，相关性，固体电解电解液中的相关作用的新见解。