Computed tomography image-based study for understanding the impact of electrode microstructure on lithium ion battery performance

基于计算机断层扫描图像的研究，用于了解电极微观结构对锂离子电池性能的影响

• 批准号: 1335850
• 负责人: Likun Zhu
• 金额: $ 29.1万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-01 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1335850&HistoricalAwards=false
• 关键词: Computed; tomography; image; based; study

PI: Zhu, LikunProposal Number: 1335850Institution: Indiana UniversityTitle: Computed tomography image-based study for understanding the impact of electrode microstructure on lithium ion battery performanceExtensive research has been conducted to develop advanced lithium ion battery (LIB) technologies to meet the demands of the ground transportation industry for LIBs with higher energy and power densities, lower cost, and safer operation. In addition to the development of advanced materials for the anode, cathode, and electrolyte, the structure of the electrodes at the micro- and nano-scales also plays a critical role in determining the performance of a LIB because the electrode?s composite matrix must be designed to provide both electron and lithium ion transportation, which eventually affects the LIB?s voltage, specific capacity, and discharge/charge rate. Currently, a fundamental understanding of the impact of an electrode?s microstructure on LIB performance is still lacking due to the inhomogeneity, complexity, and three-dimensional (3D) nature of the electrode?s microstructure. In this study, a novel approach is proposed to gain greater understanding of the microstructure of the electrode and its impact on the LIB?s physical and electrochemical performances when using liquid electrolytes as well as solid electrolytes (all-solid LIBs). The knowledge gained in this study is expected to help identify the optimal conditions of the composite electrode?s components and microstructure that will yield compact and safe LIBs with high energy and power densities.This research project takes a unique, interdisciplinary approach using experimental and theoretical analysis tools from the areas of electrochemistry, nanotechnology, transmission x-ray microscopy, material science, and numerical modeling. This work is expected to establish the engineering and scientific foundation for safe and high power/energy density LIBs. To achieve such an objective, the research efforts will first focus on the fundamental understanding of the porous microstructure of the composite electrode and its impact on the electrochemical performance of liquid electrolyte LIBs, followed by exploration into the impact of the electrode?s microstructure on all-solid LIB performances. X-ray nano-computed tomography (nano-CT) with sub-100 nm resolution will be employed to obtain the 3D microstructure of the LIB electrodes. For the first time, synchrotron x-ray nano-CT will be attempted to perform microstructural characterization of the composite electrode and to identify the particle/particle interface in all-solid LIBs. Both liquid electrolyte and all-solid LIB cells with finely tuned microstructure will be designed, fabricated, and characterized in the PIs? labs. A rich array of knowledge will be obtained through systematic experiments regarding the effects of various factors in the LIB electrodes. A comprehensive mathematical model and simulation framework based on the finite volume method will be established to reveal the physical and electrochemical processes in the electrode. The experimental and numerical results will be used to establish the correlations between the LIB?s performance and the electrode microstructure.The successful implementation of this research would directly facilitate the improvement of current LIBs that use liquid electrolytes and the development of next generation all-solid LIBs. The scientific and engineering knowledge gained from this project will improve battery capability allowing for the widespread use of environmentally sustainable energy sources, especially in ground transportation. Graduate and undergraduate students will gain critical hands-on research experience through this project. Summer camps will provide local high school students and K-12 teachers a unique opportunity to explore the interdisciplinary fields of advanced battery technologies and renewable energy.

PI: Zhu, LikunProposal Number: 1335850Institution: Indiana UniversityTitle: Computed tomography image-based study for understanding the impact of electrode microstructure on lithium ion battery performanceExtensive research has been conducted to develop advanced lithium ion battery (LIB) technologies to meet the demands of the ground transportation industry for LIBs with higher energy and power densities, lower cost, and safer operation.除了开发用于阳极，阴极和电解质的高级材料外，微型和纳米尺度在确定LIB的性能方面还起着至关重要的作用，因为必须设计电极的复合矩阵，以便提供电子和锂离子运输，最终会影响LIB的能力，并影响ILB的电量，并且要付出了特定的率，并且要驱动率，并且要驱动率。当前，由于电极的不均匀性，复杂性和电极微结构的三维（3D）性质，仍缺乏对电极微结构对LIB性能的影响的基本理解。在这项研究中，提出了一种新的方法，以更了解电极的微观结构及其对使用液体电解质以及固体电解质（所有固体Libs）时对LIB的物理和电化学性能的影响。 The knowledge gained in this study is expected to help identify the optimal conditions of the composite electrode?s components and microstructure that will yield compact and safe LIBs with high energy and power densities.This research project takes a unique, interdisciplinary approach using experimental and theoretical analysis tools from the areas of electrochemistry, nanotechnology, transmission x-ray microscopy, material science, and numerical modeling.预计这项工作将建立安全和高功率/能量密度的工程和科学基础。为了实现这一目标，研究工作将首先关注对复合电极多孔微观结构的基本理解及其对液体电解质LIBS电化学性能的影响，然后探索电极对所有固体LIB表现的影响。将采用X射线纳米计算的层析成像（纳米CT），分辨率低于100 nm，以获得LIB电极的3D微结构。首次将尝试尝试执行复合电极的微结构表征，并识别全稳态LIB中的粒子/粒子界面。将在PI中设计，制造和表征的具有细调的微结构的液体电解质和所有固体LIB细胞？实验室。通过系统的实验，将获得有关LIB电极中各种因素的影响，将获得丰富的知识。将建立一个基于有限体积方法的综合数学模型和仿真框架，以揭示电极中的物理和电化学过程。实验和数值结果将用于建立LIB的性能与电极微观结构之间的相关性。这项研究的成功实施将直接促进使用液体电解质以及下一代全稳态LIB的当前LIB的改善。从该项目中获得的科学和工程知识将提高电池能力，从而可以广泛使用环境可持续的能源，尤其是在地面运输方面。研究生和本科生将通过该项目获得关键的动手研究经验。夏令营将为当地的高中学生和K-12老师提供一个独特的机会，以探索高级电池技术和可再生能源的跨学科领域。