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SusChEM: Nonflammable, Highly Conductive Ionic Liquid based Organic-Inorganic Hybrid Electrolytes for Lithium Batteries

SusChEM：用于锂电池的不可燃、高导电离子液体基有机-无机混合电解质

基本信息

批准号：
1704173
负责人：
Qing Wang
金额：
$ 30万
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：
2017
资助国家：
美国
起止时间：
2017-07-01 至 2021-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1704173&HistoricalAwards=false
关键词：
SusChEM Nonflammable Highly Conductive Ionic

项目摘要

Lithium ion batteries have great potential to reduce dependence on fossil fuels for transportation and play a critical role in moving the U.S. toward a sustainable, clean energy future. The electrolyte, an essential component of a battery, allows the flow of electrical charge between the electrodes. Lithium-ion batteries typically use a mixture of volatile organic solvents and salts as electrolytes, which creates potential safety and reliability concerns. This research will develop a new class of nonflammable organic-inorganic hybrid Li-ion electrolytes. The research will lead to improved understanding of fundamental mechanisms of ion conduction and electrochemical properties of the solid-state electrolytes. The scientific aspects of the research program will be integrated with broader outreach and educational initiatives in the science, technology, engineering, and mathematics (STEM) fields. Additionally, this project will include international collaboration with Seoul National University in South Korea to give the students valuable experience in the international research and education. This research will address ionic liquid-based nonflammable, solid-state Li-ion electrolytes. The project includes synthesis, characterization, and ion transport in ionic liquid tethered polyhedral oligomeric silsesquioxane (POSS-IL) mixtures with lithium bistrifluoromethanesulfonimidate) salts (LiTSFI). The research will explore how tuning the interactions between the cationic structures and immobilized anions could affect ionic conductivity and electrochemical properties. The project will include the systematic variation of chemical structures of electrolytes to gain fundamental insight into how molecular structures, e.g. cationic structures and immobilized anions, affect lithium ion conductivity and electrochemical properties. The synthetic effort will be closely coupled with Raman spectroscopy, electrochemical property and battery performance measurements to create a complete picture of structure-property-performance relationships. Dielectric spectroscopy will be utilized to uncover the mechanisms of ion dissociation and transport. The project will generate fundamental understanding of the relationship between molecular structure and ion transport.

锂离子电池在减少交通运输对化石燃料的依赖方面具有巨大潜力，并在推动美国走向可持续的清洁能源未来方面发挥着关键作用。电解质是电池的重要组成部分，它允许电荷在电极之间流动。锂离子电池通常使用挥发性有机溶剂和盐的混合物作为电解质，这会产生潜在的安全性和可靠性问题。这项研究将开发出一类新的不易燃的有机-无机混合锂离子电解质。该研究将有助于提高对固态电解质的离子传导和电化学性质的基本机制的理解。研究计划的科学方面将与科学，技术，工程和数学（STEM）领域更广泛的推广和教育活动相结合。此外，该项目将包括与韩国首尔国立大学的国际合作，为学生提供国际研究和教育的宝贵经验。这项研究将解决离子液体为基础的不易燃，固态锂离子电解质。该项目包括离子液体束缚的多面体低聚倍半硅氧烷（POSS-IL）混合物与双三氟甲磺酰亚胺锂盐（LiTSFI）的合成、表征和离子传输。本研究将探讨如何调整阳离子结构和固定的阴离子之间的相互作用可以影响离子电导率和电化学性能。该项目将包括电解质化学结构的系统变化，以获得分子结构（例如阳离子结构和固定化阴离子）如何影响锂离子电导率和电化学性能的基本见解。合成工作将与拉曼光谱、电化学性能和电池性能测量紧密结合，以创建结构-性能-性能关系的完整图像。介电谱将用于揭示离子解离和传输的机制。该项目将产生分子结构和离子传输之间的关系的基本理解。