EAPSI: Elucidating the Role of Ionic Aggregate Structure on Polymer Dynamics for Charge Transport Applications

EAPSI：阐明离子聚集结构对电荷传输应用的聚合物动力学的作用

• 批准号: 1514830
• 负责人: Luri Middleton
• 金额: $ 0.51万
• 依托单位: Middleton Luri R
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-06-01 至 2016-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1514830&HistoricalAwards=false
• 关键词: EAPSI; Elucidating; Role; Ionic; Aggregate

Global and US energy consumption increases every year and consequently substantial research efforts have been devoted to improving next-generation energy solutions to keep up with demand and improve efficiency. Currently, there is intense interest in acid-containing and ion-containing polymers as this class of polymers could enable the next generation of batteries, thin film capacitors, and proton exchange membranes in fuel cells. The goal of this project is to gain fundamental understanding of the coupling between ion motion and polymer dynamics in a model ion-containing polymer system. To optimize the ion transport kinetics, a performance bottleneck in these critically important to applications, one must understand the nature of this coupling. The specific expertise in the physics of complex liquids and instrumental capabilities of Dr. Ryusuke Nozaki?s lab at Hokkaido University in Japan will be essential to investigate dynamics in this class of polymers.Interest in ionomers and other polymers with acid, ionic and polar groups is fueled by these polymers? ability to selectively transport charged species. Dielectric relaxation spectroscopy (DRS) will be used to investigate the various relaxations in a series of homologous acid copolymers neutralized with metal salts such as lithium. DRS will measure relaxations on the timescales of ion conduction and polymer motion. This technique will be combined with a recently synthesized category of acid copolymers with high levels of molecular control during synthesis to probe the coupling of motion between polymer and ion. These precise copolymers and ionomers provide unprecedented molecular control that produces well-defined morphologies and thereby facilitate the improved understanding of structure-property relationships. Specifically, the differences between discrete and percolated ionic aggregate morphologies will be investigated with the goal of accelerating ion motion relative to polymer dynamics. This NSF EAPSI award is funded in collaboration with the Japan Society for the Promotion of Science.

全球和美国的能源消耗每年都会增加，因此，大量的研究工作致力于改善下一代能源解决方案，以跟上需求并提高效率。当前，对含酸和离子的聚合物引起了极大的兴趣，因为这类聚合物可以使下一代电池，薄膜电容器和燃料电池中的质子交换膜。该项目的目的是在含离子离子的聚合物系统中对离子运动和聚合物动力学之间的耦合获得基本理解。为了优化离子传输动力学，这些对应用至关重要的性能瓶颈，必须了解这种耦合的性质。日本北海道大学的Ryusuke Nozaki博士实验室的复杂液体物理学和仪器能力的特定专业知识对于研究这类聚合物的动态至关重要。与这些聚合物燃料有关离子体和其他与酸，离子和极性基团的聚合物？能够选择性运输带电物种的能力。介电弛豫光谱（DRS）将用于研究一系列用金属盐（例如锂）中和的同源酸共聚物中的各种弛豫。 DRS将测量离子传导和聚合物运动的时间尺度的放松。该技术将与最近合成的酸共聚物类别结合，在合成过程中具有高水平的分子对照，以探测聚合物和离子之间运动的偶联。这些精确的共聚物和离子体提供了前所未有的分子对照，从而产生明确的形态，从而有助于提高对结构 - 特性关系的理解。具体而言，将研究离散离子聚集体形态之间的差异，以相对于聚合物动力学加速离子运动的目的。 该NSF EAPSI奖与日本促进科学学会合作。