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高级锂离子电池可以改善国内能源安全性，但成本和电池寿命限制使用的性能差距。电池故障的主要原因是设备内难以量化和理解的化学侧面反应。由于缺乏基本的理解，工程师无法设计材料和设备，这些材料和设备可以承受更长的时间反应。结果，迄今为止，工程师主要必须依靠经验失败测试来增加开发新技术的时间和成本。该基本研究项目采用新方法来直接测量影响电池寿命和性能的侧面反应率。然后，有关反应速率的信息将用于构建预测电池寿命的系统模型。结果将使研究人员能够设计持续时间更长并比传统方法更快地预测设备故障的材料。该项目的教育益处包括电池科学，反应堆设计和运输建模的研究生和本科研究人员培训。 PI还与西费城的当地高中和中学合作，使用动手，适合年龄的项目介绍电力和电池设计原则。已经研究了电池电极界面已有很长时间了，但是即使是基本的工作也没有得到充分解释。该项目使用两个关键的创新。首先，一种新型的微反应器控制电极之间的化学通信，从而导致反应物和产品的定义明确的运输，同时保持与非水电池相关的环境。此功能可以实现第二项创新：重点是测量影响电池性能的电化学速率常数，扩散性和电阻率。这些测量是通过用电化学发电机 - 收集器实验检测反应产物来完成的，该反应产物类似于电催化中的旋转环盘电极。四电极测量值分开现象，以确定反应如何取决于细胞电位和电解质添加剂等因素。该方法广泛适用；这项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质溶剂和添加剂的材料参数，同时测量膜溶解和生长的反应速率将使基于物理的电池模型预测系统寿命。该项目使基于物理的模型可以通过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，并在没有额外成本的情况下最大化寿命和性能。

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

Molecular Probes Reveal Chemical Selectivity of the Solid–Electrolyte Interphase