Correlating Shear and Drying Physics to Carbon Microstructure and Electrochemical Performance in Composite Electrodes

将剪切和干燥物理与复合电极中的碳微观结构和电化学性能相关联

基本信息

批准号：
1929755
负责人：
Nicolas Alvarez
金额：
$ 42.69万
依托单位：
Drexel University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-08-15 至 2024-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1929755&HistoricalAwards=false
关键词：
Correlating Shear Drying Physics Carbon

项目摘要

Electrodes composed of particle-polymer composites are used in a variety of technological applications including electric vehicles, microelectronics, and environmental remediation. The efficiency of ion and electrode transport across the electrode strongly affects the overall performance of the electrode. The electrodes are fabricated by flowing a concentrated suspension of particles over a surface and allowing the suspension to dry. The resulting particulate microstructure formed at the surface influences charge transport of the final electrode. The goal of this project is to visualize the evolution of the microstructure before, during and after the flow, coating and drying processes of electrode manufacturing. The final films will be characterized and tested to help understand the relationship between processing conditions and electrode performance. The research team will provide opportunities for students at various academic levels to participate in the research, including high school students who will be recruited to the project through the STAR and STAR LITE programs at Drexel.This hypothesis underlying this project is that nanometer-scale carbon particles dictate properties of the wet slurry and dry electrode microstructure, which strongly affect charge transport. Techniques are proposed to visualize the location of the particles and their connectivity during the coating and drying processes. To accomplish this, carbon-coated metallic nanoparticles will be seeded into the electrode slurry so that three-dimensional tomographic images of the slurry and two-dimensional elemental maps of the coating can be obtained. Microstructure visualization will be combined with in-situ measurements of slurry impedance during flow and drying, which will enable dynamic characterization of particle connectivity throughout the manufacturing process. Results of this project will provide practitioners with a better understanding of how material compositions and processing conditions can be manipulated to form more efficient electrodes.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.

由颗粒聚合物复合材料组成的电极用于多种技术应用，包括电动汽车，微电子和环境修复。离子和电极跨电极的效率强烈影响电极的整体性能。电极是通过将颗粒的浓缩悬浮液在表面上流动并使悬浮液干燥的。在表面形成的产生的颗粒微结构会影响最终电极的电荷传输。该项目的目的是可视化在流动之前，之中和之后的微观结构的演变，电极制造的涂层和干燥过程。最终电影将进行表征和测试，以帮助了解处理条件和电极性能之间的关系。研究小组将为各个学术层面的学生提供参与研究的机会，包括将通过Drexel的Star and Star Lite计划招募到该项目的高中生。该项目的基础是纳米级碳颗粒决定了湿浆和干电极微结构的性能，这强烈影响电荷传输。提出了在涂层和干燥过程中可视化颗粒位置及其连接性的技术。为此，将将碳涂层的金属纳米颗粒播种到电极浆液中，以便可以获得涂层的三维层析成像图像和涂层的二维元素图。微观结构可视化将与流量和干燥过程中浆液阻抗的原位测量结合，这将使整个制造过程中粒子连接的动态表征。该项目的结果将使从业者更好地了解如何操纵物质组成和处理条件以形成更有效的电极。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛的影响而被认为值得支持的。审查标准。