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CAREER: Predicting battery lifetime from direct measurements of inter-electrode communication

职业：通过直接测量电极间通信来预测电池寿命

基本信息

批准号：
1751553
负责人：
Maureen Tang
金额：
$ 50万
依托单位：
Drexel University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-01-01 至 2024-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1751553&HistoricalAwards=false
关键词：
CAREER Predicting battery lifetime direct

项目摘要

Advanced lithium-ion batteries for vehicle transport and renewable electricity grid storage applications could improve domestic energy security but performance gaps in cost and battery lifetime limit use. The main cause of battery failure is undesirable chemical side reactions within the device that are difficult to quantify and to understand. Because of the lack of fundamental understanding, engineers are less able to design materials and devices that can withstand side reactions for longer times. As a result, to date, engineers mainly have to rely on empirical failure tests that increase the time and cost of developing new technology. This fundamental research project applies new methods to directly measure side reaction rates that impact battery lifetime and performance. Information about reaction rates will then be used to build system models that predict battery lifetime. The results will allow researchers to design materials that last longer and to predict device failure much more rapidly than traditional methods. The educational benefits of the project include graduate and undergraduate researcher training in battery science, reactor design, and transport modeling. The PI has also partnered with local high schools and middle schools in West Philadelphia to introduce principles of electricity and battery design using hands-on, age appropriate projects. Battery electrode interfaces have been studied for a long time, but even their basic workings have not been sufficiently explained. This project uses two critical innovations. First, a novel microreactor controls chemical communication between electrodes, resulting in well-defined transport of reactants and products while maintaining an environment relevant to nonaqueous batteries. This feature enables the second innovation: a focus on measuring the electrochemical rate constants, diffusivities, and resistivities that impact battery performance. These measurements are accomplished by amperometrically detecting reaction products with electrochemical generator-collector experiments, analogous to the rotating ring disk electrode in electrocatalysis. The four-electrode measurements separate phenomena in order to determine how reactions depend on factors like cell potential and electrolyte additives. The approach is broadly applicable; the focus of this work is the high-voltage spinel LiNi0.5Mn1.5O4 (LNMO). Identifying the mechanisms of charge transfer will specify material parameters for electrolyte solvents and additives, while measuring the reaction rates of film dissolution and growth will enable physics-based battery models to predict system lifetime. This project enables physics-based models to predict battery lifetime from measured reaction parameters. Such models can identify material- and system-level approaches to prevent battery failure and maximize lifetime and performance without additional cost.

用于车辆运输和可再生电网存储应用的先进锂离子电池可以改善国内能源安全，但在成本和电池寿命方面的性能差距限制了使用。电池失效的主要原因是设备内部难以量化和难以理解的不良化学副反应。由于缺乏基本的了解，工程师们更难设计出能够承受更长时间副反应的材料和设备。因此，到目前为止，工程师们不得不主要依靠经验失败测试，这增加了开发新技术的时间和成本。这个基础研究项目应用了新的方法来直接测量影响电池寿命和性能的副反应率。然后，有关反应速率的信息将被用于建立预测电池寿命的系统模型。这一结果将使研究人员能够设计出寿命更长的材料，并比传统方法更快地预测设备故障。该项目的教育效益包括研究生和本科生研究人员在电池科学、反应堆设计和运输建模方面的培训。PI还与西费城的当地高中和中学合作，介绍使用动手的、适合年龄的项目进行电力和电池设计的原则。电池电极界面的研究由来已久，但其基本工作原理还没有得到充分的解释。该项目使用了两项关键创新。首先，一种新型的微反应器控制电极之间的化学通信，在保持与非水电池相关的环境的同时，实现反应物和产品的明确传输。这一特性实现了第二项创新：专注于测量影响电池性能的电化学速率常数、扩散系数和电阻率。这些测量是通过电化学发生器-收集器实验的安培检测反应产物来完成的，类似于电催化中的旋转环盘电极。四电极测量分离现象，以确定反应如何依赖于电池电位和电解液添加剂等因素。这种方法具有广泛的适用性；本工作的重点是高压尖晶石LiNi0.5Mn1.5O4(LNMO)。识别电荷转移的机制将指定电解液、溶剂和添加剂的材料参数，而测量薄膜溶解和生长的反应速度将使基于物理的电池模型能够预测系统寿命。该项目使基于物理的模型能够根据测量的反应参数预测电池寿命。这样的模型可以识别材料和系统级别的方法，以防止电池故障，并在不增加成本的情况下最大限度地延长寿命和提高性能。

项目成果

期刊论文数量（10）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Quantifying Environmental Effects on the Solution and Solid-State Stability of a Phenothiazine Radical Cation

DOI：
10.1021/acs.chemmater.9b05345
发表时间：
2020-02
期刊：
Chemistry of Materials
影响因子：
8.6
作者：
A. Kaur;Oliver C. Harris;N. Attanayake;Zhimin Liang;S. Parkin;Maureen H. Tang;S. Odom
通讯作者：
A. Kaur;Oliver C. Harris;N. Attanayake;Zhimin Liang;S. Parkin;Maureen H. Tang;S. Odom

Board 34: Work in Progress: Simple, Scalable Interventions to Address Academic and Mental-Health Barriers in Engineering Undergraduates

Board 34：正在进行中的工作：解决工程本科生学术和心理健康障碍的简单、可扩展的干预措施