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.

迫切需要加速全球脱碳化的努力，以支持可持续的能源经济。由于可再生能源技术（例如太阳能和风能）的间歇性，需要存储能源。高度承诺电池，因为它们可能是便携式和能量密度的（每质量存储的能量）。锂金属电极电池最多可存储高达当前可用的锂离子电池的两倍，但由于缺乏合适的电解质（溶解在溶液中），但尚未商业化。这个基本的研究项目将确定相关的电解质特性，这些特性对于预测金属电极行为至关重要，并使用这些见解来开发新型电解质，从而允许锂金属电池持续更长的时间。该教育计划将集中于使用与电池相关的节目活动（例如戏剧性表现和电池实验），作为年度“电池日”活动的一部分，以扩大芝加哥本地和国际尼日利亚国际史蒂姆（STEM）代表性不足的少数族裔的参与和持久性。该项目的综合研究和教育计划将导致能量浓密的锂金属电池，使美国更接近实现脱碳目标，扩大占代表性不足的少数族裔学生的数量，从而追求STEM的代表性不足，并启用潜水员和全球竞争性的美国劳动力。LITHIUM金属电池在理论上具有高度依赖的能量，或者是岩石金属的高度依赖，或者是矿物质的含量。电解质组成。随着连续的循环，锂沉积和剥离不均匀，导致固体电解质间相（SEI）组件的积累，以及电化学上不活性（或“死”）锂，导致永久容量损失。一种有希望应对锂金属挑战的方法是电解质设计。但是，电解质的需求很复杂，因为它们必须是非挥发性和不可易变的，并且具有高离子电导率，高锂传递数和高电化学稳定性。因此，物理混合物通常以爱迪索尼亚的方法使用，从而使电解质发育高度组合。要解决这些电解质设计挑战，该项目将具有以下目标：（1）定量电解质溶液的性能并开发相关的电解质描述符（2）设计一个模块化的多功能电解质平台，将差异的电解质属性结合在一起，将共价电解质的特性结合到单个分子中，并在单个分子中评估探测器中的电位型和型号的型号和型号的电位胶合胶，并将其概括性地变化。这项研究将为定量电解质科学和新型电解质的新途径绘制出广泛的电化学系统的新途径。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的智力优点和更广泛影响的评估评估标准的评估值得支持的。

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