CAREER: Multifunctional electrolyte design and descriptors for lithium metal batteries

职业：锂金属电池的多功能电解质设计和描述符

• 批准号: 2144454
• 负责人: Chibueze Amanchukwu
• 金额: $ 61.64万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-01-15 至 2026-12-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2144454&HistoricalAwards=false
• 关键词: CAREER; Multifunctional; electrolyte; design; descriptors

There is a pressing need to accelerate worldwide decarbonization efforts to support a sustainable energy economy. Due to the intermittency of renewable energy technologies such as solar and wind, energy storage is required. Batteries are highly promising because they can be portable and energy-dense (energy stored per mass). Lithium metal electrode batteries can store up to two times the energy of currently available Li-ion batteries but have not been commercialized because of the lack of suitable electrolytes (salts dissolved in solvent). This fundamental research project will determine relevant electrolyte properties that are important to predict lithium metal electrode behavior and use those insights to develop novel electrolytes that allow for lithium metal batteries that last longer. The educational plan will focus on using battery-related programming events (e.g. drama performance and battery experiments) as part of an annual “Battery Day” event to broaden the participation and persistence of underrepresented minorities in STEM both locally in Chicago and internationally in Nigeria. The project’s integrated research and educational plan will lead to energy-dense lithium metal batteries that bring the US closer to achieving decarbonization goals, expand the number of underrepresented minority students pursuing STEM, and enable a diverse and globally competitive US workforce.Lithium metal batteries have theoretical energy densities, but lithium metal deposits in a high surface area mossy and/or dendritic morphology that is highly dependent on electrolyte composition. With continuous cycling, uneven lithium deposition and stripping leads to the accumulation of solid electrolyte interphase (SEI) components and electrochemically inactive (or ‘dead’) lithium leading to permanent capacity loss. One approach with great promise to address lithium metal challenges is electrolyte design. However, electrolyte requirements are complex as they must be nonvolatile and nonflammable and have high ionic conductivity, high lithium transference number, and high electrochemical stability. Hence, physical mixtures are often used in an edisonian approach that makes electrolyte development highly combinatorial. To solve these electrolyte design challenges, this project will have the following objectives: to (1) quantify electrolyte solvation properties and develop relevant electrolyte descriptors (2) design a modular multifunctional electrolyte platform that covalently combines disparate electrolyte properties into a single molecule and (3) evaluate multifunctional electrolyte influence in lithium metal batteries and probe dynamic lithium metal changes in situ and ex situ. The research will chart a new path forward for quantitative electrolyte science and novel electrolytes for a broad range of electrochemical systems.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.

由于太阳能和风能等可再生能源技术的间歇性，迫切需要加快全球脱碳工作，因此电池具有便携性和高能量密度，因此前景广阔。每质量储存的能量）。锂金属电极电池的储存能量是现有锂离子电池的两倍，但由于缺乏合适的电解质（溶解在溶剂中的盐）而尚未商业化。相关的电解液的特性对于预测锂金属电极的行为非常重要，并利用这些见解来开发新型电解液，使锂金属电池的使用寿命更长。该教育计划将重点关注使用与电池相关的编程活动（例如戏剧表演和电池实验）。这是一年一度的“电池日”活动的一部分，旨在扩大芝加哥本地和尼日利亚国际上代表性不足的少数群体的参与和坚持。该项目的综合研究和教育计划将导致高能量锂金属电池的诞生。使美国更接近实现脱碳目标，增加追求 STEM 的少数族裔学生数量，并打造多元化且具有全球竞争力的美国劳动力。锂金属电池具有理论能量密度，但锂金属沉积在高表面积的苔藓和/或枝晶形态高度依赖于电解质成分，随着连续循环，不均匀的锂沉积和剥离会导致固体电解质中间相（SEI）成分的积累和电化学不活跃（或）。电解液设计是解决锂金属挑战的一种很有希望的方法，因为它们必须是非挥发性和不可燃性的，并且具有高离子电导率、高锂迁移数和稳定性。因此，物理混合物通常用于爱迪生方法，使电解质开发具有高度组合性，为了解决这些电解质设计挑战，该项目将具有以下特点。目标：（1）量化电解质溶剂化特性并开发相关电解质描述符（2）设计模块化多功能电解质平台，将不同电解质特性共价组合成单个分子，（3）评估多功能电解质对锂金属电池的影响并探测动态锂该研究将为定量电解质科学和适用于各种电化学系统的新型电解质开辟一条新的道路。该奖项反映了 NSF 的成就。法定使命，并通过使用基金会的智力优点和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Molecular engineering of fluoroether electrolytes for lithium metal batteries

• DOI: 10.1039/d2me00135g
• 发表时间: 2022
• 期刊: Molecular Systems Design & Engineering
• 作者: Yuxi Chen;Elizabeth M. Y. Lee;Phwey S Gil;P. Ma;Chibueze V. Amanchukwu;J. D. de Pablo

Co-intercalation-free ether electrolytes for graphitic anodes in lithium-ion batteries

• DOI: 10.1039/d2ee01489k
• 发表时间: 2022-10-11
• 期刊: ENERGY & ENVIRONMENTAL SCIENCE
• 影响因子: 32.5
• 作者: Ma, Peiyuan;Mirmira, Priyadarshini;Amanchukwu, Chibueze, V
• 通讯作者: Amanchukwu, Chibueze, V

Fluorination promotes lithium salt dissolution in borate esters for lithium metal batteries

• DOI: 10.1039/d3ta06228g
• 发表时间: 2024
• 期刊: Journal of Materials Chemistry A
• 影响因子: 11.9
• 作者: P. Ma;Ritesh Kumar;Minh Canh Vu;Ke-Hsin Wang;Priyadarshini Mirmira;Chibueze V. Amanchukwu