Multifunctional solid polymer electrolytes for all-solid-state batteries

全固态电池用多功能固体聚合物电解质

• 批准号: 2033882
• 负责人: Christopher Li
• 金额: $ 31.87万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2033882&HistoricalAwards=false
• 关键词: Multifunctional; solid; polymer; electrolytes; state

Lithium ion batteries are found in many daily use devices such as smartphones, laptop and tablet computers, cordless tools, and electric vehicles. However, there are safety concerns about these batteries, because failure in these devices can lead to a fire. For safe and efficient operation, lithium ion battery components have many requirements such as ionic conductivity, electrochemical stability, mechanical robustness, processability and fire retardance. In this research project, the investigators will use a tunable chemical platform to address these simultaneous requirements. This battery system includes a polymer network base that is made of chain-like molecules bonded together to form a highly connected scaffold. The system also includes comb-like structures that consist of polymers extending off the network scaffold. Additional components, such as stabilizers or fire retardants, can be added to the end of the combs to impart the corresponding properties to the system. By changing the structure or composition of the network scaffold, the investigators will study how the material properties can be altered to optimize the overall performance of the system. Using the concepts learned during this project, the participants will develop two class modules for a course on nanostructured polymeric materials. Additionally, high school students and teachers, particularly from groups under-represented in STEM fields, will be involved in the research activities via the Summer Engineering Experience at Drexel Program.In this research project the investigators aim to design, synthesize, and implement a series of multifunctional and versatile comb-chain crosslinker based network solid polymer electrolytes (ConSPEs). The versatility element comes from the large number of functional groups found on the ends of the chains and cross-linkers, which provide fast cross-linking and an opportunity to add further components. Using this platform the investigators will tune network chemistry, architecture, mechanical and electrochemical properties to address the high performance electrolyte needs. Specifically, components will be added to target a given, desired solid electrolyte property. For example, poly(propylene carbonate) would improve voltage stability and transference number, while grafted halogenated moieties would improve fire retardance, solid electrolyte interface formation and cycling performance. The investigators will characterize the materials using oscillatory shear and classical tensile mechanical measurements, and small-length scale dependent mechanical properties will be assessed using quantitative nanomechanical mapping via atomic force microcopy. Electrochemical characterizations include ion conductivity via electrochemical impedance and cycling stability via cyclic voltammetry. After establishing a library of ConSPE materials, the investigators will select two differing materials and combine them into bilayer structures. Such asymmetric bilayer materials might be more capable than a uniform materials of meeting the different requirements of the anode- and cathode-facing sides of the solid electrolyte.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.

锂离子电池可在许多日常使用设备中发现，例如智能手机，笔记本电脑和平板电脑，无绳工具和电动汽车。但是，这些电池存在安全问题，因为这些设备的故障可能导致火灾。为了安全有效的操作，锂离子电池组件有许多要求，例如离子电导率，电化学稳定性，机械鲁棒性，加工性和耐火性。在该研究项目中，研究人员将使用可调化学平台来满足这些同时要求。该电池系统包括一个聚合物网络基础，该聚合物网络基础由链式的分子制成，形成高度连接的支架。该系统还包括梳状结构，这些结构包括延伸网络支架的聚合物。可以将其他组件（例如稳定器或阻燃剂）添加到梳子的末端，以将相应的属性赋予系统。通过更改网络支架的结构或组成，研究人员将研究如何更改材料特性以优化系统的整体性能。使用该项目中学到的概念，参与者将开发两个类模块，以供纳米结构化的聚合物材料课程。此外，高中生和老师，尤其是来自STEM领域中代表性不足的小组，将通过Drexel计划的夏季工程经验参与研究活动。在该研究项目中，研究人员旨在设计，合成和实施一系列多功能和多功能的梳子链链链链接链接链接网络固体网络固体聚合物电解质（Conspes）。多功能性元素来自链条和交联的末端发现的大量官能团，这些官能团提供了快速的交联和添加更多组件的机会。使用此平台，研究人员将调整网络化学，建筑，机械和电化学特性，以满足高性能电解质需求。具体而言，将添加组件以靶向给定的所需固体电解质特性。例如，聚丙烯碳酸盐将改善电压稳定性和转移数，而移植的卤代部分将改善火力阻滞性，固体电解质界面形成和循环性能。研究人员将使用振荡性剪切和经典的拉伸机械测量表征材料，并且将使用定量纳米力学映射通过原子力微拷贝来评估依赖性的机械性能。电化学特征包括通过循环伏安法的电化学阻抗和循环稳定性的离子电导率。在建立了销售材料库后，研究人员将选择两种不同的材料，并将它们组合成双层结构。这样的不对称双层材料可能比满足固体电解质的阳极和阴极面的不同要求的均匀材料更有能力。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的影响审查标准来评估通过评估来获得支持的。

项目成果

Interpenetrating Network-Based Hybrid Solid and Gel Electrolytes for High Voltage Lithium Metal Batteries

• DOI: 10.1021/acsaem.1c00451
• 发表时间: 2021-06
• 作者: Yongwei Zheng;Xiaowei Li;William R. Fullerton;Qiang Qian;Mingwei Shang;J. Niu;Christopher Y. Li

Decoupling the Modulus and Toughness Effects of Solid Polymer Electrolytes in All-Solid-State Lithium Batteries

解耦全固态锂电池中固体聚合物电解质的模量和韧性影响

• DOI: 10.1021/acsaem.1c02857
• 发表时间: 2021
• 期刊: ACS Applied Energy Materials
• 影响因子: 6.4
• 作者: Zheng, Yongwei;Li, Xiaowei;Fullerton, William R.;Li, Christopher Y.
• 通讯作者: Li, Christopher Y.

Designing Comb-Chain Crosslinker-Based Solid Polymer Electrolytes for Additive-Free All-Solid-State Lithium Metal Batteries

• DOI: 10.1021/acs.nanolett.0c03033
• 发表时间: 2020-09-09
• 期刊: NANO LETTERS
• 影响因子: 10.8
• 作者: Li, Xiaowei;Zheng, Yongwei;Li, Christopher Y.
• 通讯作者: Li, Christopher Y.