Mechanics of Organic Mixed Ionic-Electronic Conductors (OMIECs)

有机混合离子电子导体 (OMIEC) 的力学

基本信息

批准号：
2210158
负责人：
Kejie Zhao
金额：
$ 39.81万
依托单位：
Purdue University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2022
资助国家：
美国
起止时间：
2022-09-01 至 2025-08-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2210158&HistoricalAwards=false
关键词：
Mechanics Organic Mixed Ionic Electronic

项目摘要

This grant will focus on understanding the mechanical behavior of organic conductors in interaction with conduction of ions and electrons. Organic mixed ionic-electronic conductors are the core functional component of organic electrochemical devices such as organic electrochemical transistors, electrochromic devices, energy harvesters/storage, and light-emitting devices. While most efforts on mixed conductors are currently focused on the charge and ion dynamics, the strong coupling of the electronic/ionic conduction with structural changes and mechanical deformation is largely unknown. This project will formulate a theoretical framework and experimental protocols for the understanding, evaluation, and improvement of organic mixed conductors for mechanically reliable, high performance organic electronics. The research will create fundamental knowledge on the concurrent ionic-electronic transport and chemomechanical responses in polymeric conductors via a close integration of theoretical and experimental approaches. The interdisciplinary nature of the project provides unique training opportunities for students at different levels. The various outreach activities, in collaboration with the Women in Engineering Program at Purdue, will focus on the engagement of underrepresented minorities, and will promote the interest of undergraduate and K-12 students toward the engineering career pathway.The overarching goal of the research is to understand the interplay between electronic, ionic, and mechanical responses in organic conductors using coordinated multi-physics continuum theories, multi-scale computational modeling, and experimental validations. The project includes three specific tasks. (i) Formulate a continuum theoretical framework that describes the underlying physics of mass transport, electron/hole conduction, and mechanical stresses. Develop a finite element model to simulate the electrochemical/mechanical processes in organic comductors. Perform electrochemical/moving front experiments on the doping kinetics and stress-sensitive kinetics to feed the theory. (ii) Understand the mechanical constitutive behavior and the molecular-scale structure-property relationship through complementary tools of in-situ nanoindentation and molecular modeling on intermolecular interactions. (iii) Understand the mechanical damage using finite element analysis and experiments. Conduct mechanical tests to evaluate interfacial strength, perform cyclic voltammetry to evaluate the electrochemical performance, and employ optical microscope and absorbance spectroscopy to identify mechanical damage. Unravel the correlation between the mechanical reliability and device performance and determine the key material and geometrical parameters that govern the damage initiation and evolution in solid-state organic devices. The fundamental understanding on the mechanics of organic mixed conductors will shift the research paradigm towards a complete design spectrum of concurrent ionic and electronic conduction and mechanical reliability in electrochemical devices.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该赠款将着重于了解有机导体与传导离子和电子相互作用的机械行为。有机混合离子电导导体是有机电化学设备的核心功能组成部分，例如有机电化学晶体管，电化学设备，能量收割机/储存器/存储和光发射器件。尽管当前对混合导体的大多数努力都集中在电荷和离子动力学上，但电子/离子传导与结构变化和机械变形的强耦合在很大程度上尚不清楚。该项目将制定一个理论框架和实验方案，以理解，评估和改进机械可靠，高性能有机电子产品的有机混合导体。这项研究将通过与理论和实验方法的密切整合在聚合物导体中的同时离子电气传输和化学机械响应中创造基本知识。该项目的跨学科性质为不同级别的学生提供了独特的培训机会。各种外展活动，与普渡大学的工程女性合作，将集中于代表性不足的少数群体的参与，并将促进本科生和K-12学生对工程职业途径的兴趣。该研究的总体目标是使用电子，离子型和机械型的相互作用，以了解有机型，机械型的相互作用，和实验验证。该项目包括三个特定任务。（i）制定一个连续理论框架，描述了质量传输，电子/孔传导和机械应力的潜在物理。开发有限元模型，以模拟有机合并器中的电化学/机械过程。对兴奋剂动力学和应激敏感动力学进行电化学/运动前实验，以供应该理论。（ii）通过对分子间相互作用的原位纳米识别和分子建模的互补工具了解机械组成型行为和分子规范性关系。（iii）使用有限元分析和实验了解机械损伤。进行机械测试以评估界面强度，执行循环伏安法以评估电化学性能，并采用光学显微镜和吸光度光谱来识别机械损伤。揭示机械可靠性与设备性能之间的相关性，并确定控制固态有机设备损伤启动和演变的关键材料和几何参数。对有机混合导体机制的基本理解将把研究范式转移到电离和电子传导以及电化学设备中的机械可靠性的完整设计范围内。这项奖项反映了NSF的法定任务，并通过基金会的知识优点和广泛的影响来评估NSF的法定任务，并被认为是值得的支持。