权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Energy materials based on single-ion conducting polymers mixed with zwitterions

基于与两性离子混合的单离子导电聚合物的能源材料

基本信息

批准号：
1807934
负责人：
Ralph Colby
金额：
$ 63.41万
依托单位：
Pennsylvania State Univ University Park
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-08-01 至 2023-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1807934&HistoricalAwards=false
关键词：
Energy materials based single ion

项目摘要

NON-TECHNICAL SUMMARY: Applications that will be enabled by new materials in the energy arena simultaneously require maximal conductivity of one and only one type of ion. This research on ion conduction and dielectric constant of polymeric energy materials aims to understand the structure-property relations in polymers that conduct only one type of ion, such as lithium for advanced batteries and perhaps larger mobile ions for supercapacitors, sensors, and mechanical actuators. A way to increase the mobility of the conducting ions is to add "zwitterions", which are small molecules containing both positive and negative charges, to single-ion conducting polymers. Although the method of adding zwitterions to polymeric materials has shown promise, fundamental insight is needed to design materials for specific functions for future applications. If successful, the fundamental knowledge generated from this research will result in the understanding needed to design polymeric materials for a variety of specific energy applications, including advanced batteries, fuel cells, solar cells, ionic actuators, supercapacitors, and energy harvesting devices (each of which require maximizing ion transport). Each of those applications has the potential to change current technologies and improve the lives of humans across the globe. This project will also provide advanced scientific training and exposure to interdisciplinary research to graduate and undergraduate students, as well as opportunities for outreach.TECHNICAL SUMMARY: Ionomers are an important class of energy materials for applications that require single-ion conduction, yet their structure-property relations are only beginning to be explored. In this research, three novel types of materials are being made: (1) High molecular weight polycations with conducting counter-anions that are homopolymers, random copolymers and diblock copolymers, (2) high molecular weight polyanions with conducting counter-cations that are homopolymers, random copolymers and diblock copolymers, and (3) polar small molecule zwitterions that are non-volatile plasticizers for both types of ionomers to boost ionic conductivity. A key fundamental question is how mixtures of ionomers and zwitterions can be optimized by careful molecular design of the two. If successful, this research will reveal the design rules for the codesign of ionomer and zwitterion. By fully understanding the dielectric response of these materials (including the temperature dependence of dielectric constant and ionic conductivity) and using X-ray scattering to detail their morphology, the effects of systematic variations in zwitterion structure in such mixtures will be understood in detail. By exploring the parameter space of ion content, counterion type and polarity (dielectric constant) of the zwitterion, the potential of this class of energy materials, in terms of highest possible dielectric constant and ionic conductivity, will be determined.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术性总结：新材料在能源竞技场中的应用同时需要一种且仅一种类型的离子的最大电导率。这项关于聚合物能源材料的离子传导和介电常数的研究旨在了解仅传导一种类型离子的聚合物的结构-性能关系，例如用于先进电池的锂，以及用于超级电容器，传感器和机械致动器的更大的移动的离子。增加导电离子的迁移率的一种方法是向单离子导电聚合物中加入“两性离子”，两性离子是含有正电荷和负电荷的小分子。虽然将两性离子添加到聚合物材料中的方法已经显示出前景，但需要基本的见解来设计用于未来应用的特定功能的材料。如果成功的话，从这项研究中产生的基础知识将导致为各种特定的能源应用设计聚合物材料所需的理解，包括先进的电池，燃料电池，太阳能电池，离子致动器，超级电容器和能量收集设备（每一个都需要最大化离子传输）。这些应用中的每一项都有可能改变当前的技术，改善地球仪上人类的生活。该项目还将为研究生和本科生提供先进的科学培训和跨学科研究的机会，以及推广的机会。技术摘要：离聚物是一类重要的能源材料，用于需要单离子传导的应用，但它们的结构-性能关系才刚刚开始探索。在这项研究中，正在制造三种新型材料：（1）具有导电抗衡阴离子的高分子量聚阳离子，其为均聚物、无规共聚物和二嵌段共聚物，（2）具有导电抗衡阳离子的高分子量聚阴离子，其为均聚物、无规共聚物和二嵌段共聚物，和（3）极性小分子两性离子，其是用于两种类型的离聚物的非挥发性增塑剂以提高离子电导率。一个关键的基本问题是离聚物和两性离子的混合物如何通过仔细的分子设计来优化。如果成功，这项研究将揭示离聚物和两性离子协同设计的设计规则。通过充分了解这些材料的介电响应（包括介电常数和离子电导率的温度依赖性），并使用X射线散射来详细说明它们的形态，将详细了解这种混合物中两性结构的系统变化的影响。通过探索离子含量、电荷类型和极性（介电常数）的参数空间，将确定这类能源材料在最高可能介电常数和离子电导率方面的潜力。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。