Fundamental Understanding of SEI Effects on Li Dendrite Formation and Growth

SEI 对锂枝晶形成和生长影响的基本理解

• 批准号: 2313395
• 负责人: Farzad Mashayek
• 金额: $ 35.34万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-10-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2313395&HistoricalAwards=false
• 关键词: Fundamental; Understanding; SEI; Effects; Li

Lithium ion batteries are the state-of-the-art choice for powering today's electric and hybrid electric vehicles. The energy density and power capability are limited; new chemistries are needed to increase the performance of the electric vehicle. Replacing the graphite electrodes in the commercialized lithium-ion batteries with lithium metal is expected to boost the energy density of batteries significantly. However, research efforts to use lithium metal electrodes in batteries have failed due to non-uniform deposition of lithium metal during charge and discharge cycles. This project will utilize several state-of-the art computer simulation tools and real-time microscopy techniques to investigate the lithium metal deposition in various battery electrolytes. In particular, the project will address how the by-products of electrolyte reactions with lithium metal affect the growth and morphology of lithium dendrites. The formation of these filaments in the battery shorts the battery causing failure. The results of this project will pave the road for developing high energy density lithium metal batteries. Several venues for integrating research with undergraduate and graduate education and outreach activities at University of Illinois at Chicago (UIC) will occur as a result of this project. Graduate and undergraduate students will be exposed to several advanced microscopy tools and computer simulation packages that will provide a unique set of research experience. Outreach activities are planned to disseminate the results of this study to high school and undergraduate students and motivate them to pursue studies related to electrochemical energy storage technologies. Outreach activities for local high school female and underrepresented students in STEM during the UIC-Mechanical and Industrial Engineering Department Open House and UIC Summer Youth Program will be conducted. Lithium-metal electrodes have the potential to enable lightweight and high energy density batteries for transportation propulsion applications. A major obstacle to achieve this goal remains on the non-uniform deposition of lithium metals that appear in the form of fibrous or dendritic morphology. These lithium dendrites can poke through the electrolyte and separator of batteries and eventually result in electrical short circuit potentially causing fire. Significant research has been conducted to develop prevention mechanisms of Li dendrite growth; however, the progress has been limited due to the lack of fundamental understanding on the formation and growth of the dendrites. The fundamental questions such as how Li dendrites are formed, grown and split under the influence of the solid electrolyte interface (SEI) remain unanswered. The PIs will employ a multi-scale and multi-physics approach using advance experimental and theoretical methods such as in-situ transmission electron microscopy (TEM), in-operando optical microscopy, electrochemical impedance spectroscopy (EIS), density functional theory (DFT) calculations, and phase-field modeling (PFM) to study the growth of Li dendrites under the SEI influence.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.

锂离子电池是为当今电动和混合动力汽车供电的最新选择。能量密度和功率能力受到限制；需要新的化学作用来提高电动汽车的性能。用锂金属代替商业化锂离子电池中的石墨电极将显着提高电池的能量密度。然而，由于电荷金属在电荷和放电周期中锂金属的不均匀沉积，在电池中使用锂金属电极的研究工作失败了。该项目将利用几种最先进的计算机仿真工具和实时显微镜技术来研究各种电池电解质中的锂金属沉积。特别是，该项目将解决与锂金属的电解质反应的副产品如何影响锂树突的生长和形态。电池中这些细丝的形成会导致电池故障。该项目的结果将为开发高能锂金属电池的道路铺平道路。该项目将在伊利诺伊大学（UIC）的本科和研究生教育以及外展活动中融合研究的几个场所。研究生和本科生将接触到几种高级显微镜工具和计算机模拟软件包，这些工具将提供独特的研究经验。计划进行外展活动，以将这项研究的结果传播给高中和本科生，并激励他们从事与电化学能源储能技术有关的研究。在UIC机械和工业工程部开放日和UIC夏季青年计划期间，针对STEM的当地高中女性和代表性不足的学生的外展活动将进行。锂金属电极有可能使轻质和高能密度电池用于运输推进应用。实现此目标的一个主要障碍仍然存在于以纤维或树突形态形式出现的锂金属的不均匀沉积。这些锂树突可以通过电池的电解质和分离器戳，并最终导致电气短路可能引起火灾。已经进行了大量研究以开发李树突生长的预防机制。但是，由于缺乏对树突的形成和成长的基本了解，因此进展受到限制。基本问题，例如在固体电解质界面（SEI）的影响下如何形成Li树突，生长和分裂的基本问题仍然没有得到解答。 The PIs will employ a multi-scale and multi-physics approach using advance experimental and theoretical methods such as in-situ transmission electron microscopy (TEM), in-operando optical microscopy, electrochemical impedance spectroscopy (EIS), density functional theory (DFT) calculations, and phase-field modeling (PFM) to study the growth of Li dendrites under the SEI influence.This award reflects NSF的法定使命，并使用基金会的知识分子优点和更广泛的影响审查标准来评估值得支持。

项目成果

Direct Visualization of Polymerization-Induced Self-Assembly of Amphiphilic Copolymers

• DOI: 10.1021/acs.macromol.2c02318
• 发表时间: 2023-04
• 期刊: Macromolecules
• 影响因子: 5.5

Fast rate lithium metal batteries with long lifespan enabled by graphene oxide confinement

通过氧化石墨烯限制实现具有长寿命的快速锂金属电池

• DOI: 10.1039/d3ya00083d
• 发表时间: 2023
• 期刊: Energy Advances
• 作者: Jabbari, Vahid;Yurkiv, Vitaliy;Ghorbani, Alireza;Mashayek, Farzad;Shahbazian-Yassar, Reza
• 通讯作者: Shahbazian-Yassar, Reza

Understanding intercalation chemistry for sustainable aqueous zinc–manganese dioxide batteries

• DOI: 10.1038/s41893-022-00919-3
• 发表时间: 2022-08
• 期刊: Nature Sustainability
• 影响因子: 27.6
• 作者: Yifei Yuan;R. Sharpe;Kun He;Chenghang Li-;Mahmoud Tamadoni Saray;Tongchao Liu;Wentao Yao;M. Cheng

In situ formation of stable solid electrolyte interphase with high ionic conductivity for long lifespan all-solid-state lithium metal batteries

• DOI: 10.1016/j.ensm.2023.02.009
• 发表时间: 2023-02-09
• 期刊: ENERGY STORAGE MATERIALS
• 影响因子: 20.4
• 作者: Jabbari, Vahid;Yurkiv, Vitaliy;Shahbazian-Yassar, Reza
• 通讯作者: Shahbazian-Yassar, Reza