CAREER: Electro-Chemo-Mechanics of Polymer/Active Material Interface Fracture

职业：聚合物/活性材料界面断裂的电化学力学

• 批准号: 1652409
• 负责人: Siva Nadimpalli
• 金额: $ 50万
• 依托单位: New Jersey Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-01 至 2020-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1652409&HistoricalAwards=false
• 关键词: CAREER; Electro; Chemo; Mechanics; Polymer

This Faculty Early Career Development (CAREER) Program research project aims to provide a fundamental and quantitative understanding of the fracture behavior of polymer/active material interfaces that are found in almost all existing and many emerging rechargeable battery chemistries. The mechanical integrity of these interfaces is critical for sustaining electrochemical reactions in the battery systems; consequently, it dictates the long-term performance (or durability) of batteries. Fracture of the polymer/active particle interface electrically isolates active particles and is one of the predominant mechanisms by which capacity fade occurs in batteries, yet the mechanics of this interface failure is the least understood problem. Also, the interfaces in batteries are more complex and their properties change continuously. The novel in situ techniques and fracture criterion developed here will be useful in the validation of multi-physics battery models and development of new electrode material designs for emerging battery technologies that can transform automotive, biomedical, aerospace, and military applications where durability is an important requirement. The integrated education plan includes development of a lab module for students at NJIT that demonstrates the process of stress generation (cause of mechanical damage) during electrochemical cycling processes. This module will be modified and adapted into outreach programs for K-12 students and teachers. This award also enables elementary teacher trainees from the Newark school system to participate in the research. The polymer/active material interface fracture has been a major roadblock for the rapid advancement of next generation battery electrodes such as Si, Sn, Al, and other large volume change materials. To address these challenges, a combination of novel in situ fracture experiments and supporting models will provide a fundamental understanding of how the interface properties evolve during battery operation and to understand the chemo-mechanical factors that influence the interface fracture behavior. To keep the effort more focused, the interface system in lithium-ion batteries is considered as a model system. A fracture mechanics framework with an interface constitutive model that can incorporate in situ observations, will be developed for prediction of interface failure during an electrochemical reaction. This research will enable interface failure prediction under concurrent mechanical and electrochemical loading using the fracture mechanics models; hence, it lays the groundwork for the essential fundamental understanding to develop long cyclic life, low-cost, and durable batteries for a diverse range of applications.

该学院早期职业发展（CAREER）计划研究项目旨在提供对几乎所有现有和许多新兴可充电电池化学物质中发现的聚合物/活性材料界面断裂行为的基本和定量理解。这些界面的机械完整性对于维持电池系统中的电化学反应至关重要。因此，它决定了电池的长期性能（或耐用性）。聚合物/活性颗粒界面的断裂使活性颗粒电隔离，并且是电池中发生容量衰减的主要机制之一，但这种界面失效的机制是人们最不了解的问题。此外，电池中的界面更加复杂，其性能不断变化。这里开发的新颖的原位技术和断裂准则将有助于验证多物理电池模型和开发新兴电池技术的新电极材料设计，这些技术可以改变耐久性至关重要的汽车、生物医学、航空航天和军事应用要求。综合教育计划包括为新泽西理工学院的学生开发一个实验室模块，该模块演示电化学循环过程中应力产生的过程（机械损伤的原因）。该模块将被修改并适应 K-12 学生和教师的外展计划。该奖项还使纽瓦克学校系统的小学教师实习生能够参与这项研究。聚合物/活性材料界面断裂一直是下一代电池电极（如硅、锡、铝和其他大体积变化材料）快速发展的主要障碍。为了应对这些挑战，新颖的原位断裂实验和支持模型的结合将提供对电池运行过程中界面特性如何演变的基本了解，并了解影响界面断裂行为的化学机械因素。为了使工作更加集中，锂离子电池中的接口系统被视为模型系统。将开发具有界面本构模型的断裂力学框架，该模型可以结合原位观察，用于预测电化学反应期间的界面失效。这项研究将利用断裂力学模型实现同时机械和电化学负载下的界面失效预测；因此，它为开发适用于各种应用的长循环寿命、低成本且耐用的电池奠定了基础。

项目成果

Real-Time Stress Measurement in SiO2 Thin Films during Electrochemical Lithiation/Delithiation Cycling

电化学锂化/脱锂循环过程中 SiO2 薄膜的实时应力测量

• DOI: 10.1007/s11340-017-0371-2
• 发表时间: 2018-01-10
• 期刊: Experimental Mechanics
• 影响因子: 2.4
• 作者: Subhajit Rakshit;R. Tripuraneni;S. Nadimpalli
• 通讯作者: S. Nadimpalli

In Situ Measurement of the Effect of Stress on the Chemical Diffusion Coefficient of Li in High-Energy-Density Electrodes

原位测量应力对高能量密度电极中锂化学扩散系数的影响

• DOI: 10.1149/2.0641810jes
• 发表时间: 2024-09-13
• 期刊: Journal of The Electrochemical Society
• 影响因子: 3.9
• 作者: R. Tripuraneni;S. Rakshit;S. Nadimpalli
• 通讯作者: S. Nadimpalli

Characterization and Prediction of Polymer/Active Material Interface Failure in Battery Electrodes

电池电极中聚合物/活性材料界面失效的表征和预测

• DOI: 10.1007/s11340-022-00924-9
• 发表时间: 2023-02
• 期刊: Experimental Mechanics
• 影响因子: 2.4
• 作者: Pakhare, A. S.;Nadimpalli, S. P.
• 通讯作者: Nadimpalli, S. P.

Measurement of Volume Changes and Associated Stresses in Ge Electrodes Due to Na/Na + Redox Reactions

Na/Na 氧化还原反应引起的 Ge 电极体积变化和相关应力的测量

• DOI: 10.1149/1945-7111/abd5fc
• 发表时间: 2021-01
• 期刊: Journal of The Electrochemical Society
• 影响因子: 3.9
• 作者: Rakshit, Subhajit;Pakhare, Akshay S.;Ruiz, Olivia;Khoshi, M. Reza;Detsi, Eric;He, Huixin;Sethuraman, Vijay A.;Nadimpalli, Siva P. V.
• 通讯作者: Nadimpalli, Siva P. V.

Experiments and modeling of the viscoelastic behavior of polymeric gels

聚合物凝胶粘弹性行为的实验和建模

• DOI: 10.1016/j.jmps.2019.103829
• 发表时间: 2020-04
• 期刊: Journal of the Mechanics and Physics of Solids
• 影响因子: 5.3
• 作者: Bosnjak, Nikola;Nadimpalli, Siva;Okumura, Dai;Chester, Shawn A.
• 通讯作者: Chester, Shawn A.