Bridging Mechanics and Electrochemistry: Theories and Experiments on Battery Materials

桥接力学和电化学：电池材料的理论与实验

基本信息

批准号：
1726392
负责人：
Kejie Zhao
金额：
$ 32.64万
依托单位：
Purdue University
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：
2017-07-15 至 2022-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1726392&HistoricalAwards=false
关键词：
Bridging Mechanics Electrochemistry Theories Experiments

项目摘要

Mechanical issues are ubiquitous in energy storage, conversion, and harvesting. In rechargeable batteries, which are a key enabler of portable electronics and electrification of automotive transportation, mechanical degradation compromises the performance of current technology and limits the implementation of next-generation high-capacity energy materials. This project seeks to describe the aging mechanisms in batteries, which would also facilitate the development of energy storage materials with enhanced mechanical reliability. This will be achieved through a focus on understanding the fundamental coupling between mechanical forces and electrochemistry or energy storage performance via a close integration of theoretical modeling and experimental characterizations. The outcome of this research will have a broad impact on diverse sectors of the industry, from wearable electronics to electric cars. On the education front, the project will create opportunities to train graduate students in the complex sciences of electrochemistry and mechanics as well as educate students in the mechanics of energy storage materials. The outreach activities will also enhance an existing collaboration with the Women in Engineering program at Purdue to encourage participation of female students in engineering sciences.The overarching goal of this project is to unravel the fundamental coupling between mechanics and electrochemistry using integrated theories and experiments on battery materials. Research effort include formulating a theory of stress-modulated electron transfer and ion diffusion to understand the effects on energy capacity. Similarly, the continuum theory of stress-composition-reaction coupling will lay a foundation for understanding how mechanical stress modulates the electrochemical processes and how the latter mediates failure and aging of energy materials. The computational modeling of heterogeneous structures in batteries will advance the understanding of stress-regulated kinetics and capacity. The experiments will use energy harvester devices and solid-state batteries in conjunction with a novel electrochemical nano-indenter and coupons based on mechanical testing standards to provide data for the validation of the continuum theories.

机械问题在储能，转换和收获中无处不在。在可充电电池中，这是便携式电子设备的关键推动力和汽车运输的电气化，机械退化损害了当前技术的性能，并限制了下一代高容量能源材料的实施。该项目旨在描述电池的老化机制，这也将促进具有增强机械可靠性的储能材料的开发。这将通过关注理解机械力与电化学之间的基本耦合或通过理论建模和实验特征的密切整合来实现。这项研究的结果将对从可穿戴电子产品到电动汽车的行业各个部门产生广泛的影响。在教育方面，该项目将创造机会培训研究生在电化学和力学的复杂科学方面，并教育学生的能源储能材料机制。外展活动还将加强与普渡大学工程计划的现有合作，以鼓励女学生参与工程科学。该项目的总体目标是使用整合的理论和实验在电池材料上揭示力学与电化学之间的基本耦合。研究工作包括制定应力调节的电子传递和离子扩散理论，以了解对能量的影响。同样，应力分解反应耦合的连续性理论将为理解机械应力如何调节电化学过程以及后者介导能量材料的失败和衰老如何调节。电池中异质结构的计算建模将提高对应力调节的动力学和容量的理解。该实验将使用基于机械测试标准的新型电化学纳米式纳米式纳米式和优惠券结合使用能量收割机和固态电池，以提供数据以验证连续性理论。

项目成果

期刊论文数量（14）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Heterogeneous Damage in Li-Ion Batteries: Experimental Analysis and Theoretical Modeling

DOI：
10.1016/j.jmps.2019.05.003
发表时间：
2019-08
期刊：
ECS Meeting Abstracts
影响因子：
0
作者：
Rong Xu;Yang Yang-Yang;Fei Yin;Pengfei Liu;P. Cloetens;Yijin Liu;Feng Lin;K. Zhao
通讯作者：
Rong Xu;Yang Yang-Yang;Fei Yin;Pengfei Liu;P. Cloetens;Yijin Liu;Feng Lin;K. Zhao

Operando Nanoindentation: A New Platform to Measure the Mechanical Properties of Electrodes during Electrochemical Reactions