CAS: Controlling Solid Electrolyte Interphases using Organometallic Electrolyte Additives

CAS：使用有机金属电解质添加剂控制固体电解质界面

• 批准号: 2350403
• 负责人: Neal Mankad
• 金额: $ 39.06万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-09-01 至 2027-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2350403&HistoricalAwards=false
• 关键词: CAS; Controlling; Solid; Electrolyte; Interphases; CAS; Controlling; Solid; Electrolyte; Interphases

With support from the Chemical Structure, Dynamics & Mechanisms B Program of the Chemistry Division, Professor Neal Mankad of the Department of Chemistry at the University of Illinois-Chicago is developing new organometallic complexes to serve as additives in battery electrolytes. The goal of this research is to exploit the ability of small loadings of these compounds to influence the chemistry at anode surfaces, with the ultimate goal of improving long-term cycling stability and operational safety of high-density batteries such as those with lithium metal anodes. The project lies at the interface of organometallic chemistry, electrochemistry, and battery design and is, therefore, well suited to the education of scientists at all levels. This team is also well positioned to provide education and training for students underrepresented in science. Outreach activities involving science coaching of Chicago-area high school students will also be part of the project.The project is based on preliminary data obtained by the team showing that quadruply-bonded dimolybdenum(II) complexes supported by 2-(2-methoxyethoxy)acetate ligands reversibly bind lithium ions in the second coordination sphere, inducing aggregation of cationically charged coordination oligomers that self-assemble onto the anode surface in electrochemical cells. Upon deposition, the modified electrodes are found to have significantly modified compositions at the solid-electrolyte interphases and display measurably different lithium plating and stripping behaviors compared to control systems lacking the dimolybdenum additive. This project aims to address three questions: (i) What is the mechanism of the observed behavior under lithium metal battery cycling conditions? (ii) How does the behavior change when the organometallic additive structure is varied to modulate the lithium ion binding constant and/or reduction potential? (iii) Does this behavior extend to “beyond lithium” technologies such as sodium and magnesium metal batteries? If successful, these research studies will likely have broad scientific impact on electrochemical cell/battery design, performance and sustainability.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.

在化学结构，动力学B计划的支持下，伊利诺伊州 - 芝加哥大学化学系的尼尔·曼卡德（Neal Mankad）教授正在开发新的有机综合体，以作为电池电解质的添加剂。这项研究的目的是利用这些化合物的小负载能够影响阳极表面上的化学反应的能力，其最终目的是改善长期循环稳定性和高密度电池（例如含锂金属阳极的人）的操作安全性。该项目在于有机化学，电化学和电池设计的界面，因此非常适合各级科学家的教育。该团队也有能力为科学领域不足的学生提供教育和培训。 Outreach activities involving science coaching of Chicago-area high school students The project is based on preliminary data obtained by the team showing that quadruply-bonded dimolybdenum(II) complexes supported by 2-(2-methoxyethoxy)acetate ligands reversibly bind lithium ions in the second coordination sphere, inducing aggregation of cationically charged coordination oligomers that self-assemble onto the电化学细胞中的阳极表面。沉积后，发现修饰的电极在固体电解质相互作用处具有显着修饰的组成，并且与缺乏dimolybdenum添加剂的对照系统相比，显示出可测量地不同的锂电池和剥离行为。该项目旨在解决三个问题：（i）在锂金属电池循环条件下观察到的行为的机制是什么？ （ii）当有机添加剂结构变化以调节锂离子结合常数和/或还原电位时，行为会发生变化？ （iii）这种行为是否扩展到诸如钠和镁金属电池之类的“超越锂”技术？如果成功的话，这些研究可能会对电化学电池/电池设计，性能和可持续性产生广泛的科学影响。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响审查标准，认为通过评估被认为是宝贵的支持。