Join the ECS Detroit Section for Dr. Yiyang Li’s presentation, “Understanding Li-ion Batteries By (Dis) Charging One Particle at a Time,” on January 25, 2024.
Li-ion batteries are made of an ensemble of micron-sized battery particles within a porous electrode architecture. Nearly all electrochemical measurements are conducted on the particle ensemble, making it difficult to understand the intrinsic behavior of the individual battery particles. In this presentation, we discuss our recent efforts to understand NMC cathode particles using the multielectrode electrode array. Originally developed for neuroscience, the microelectrode array enables us to isolate individual battery particles on its own ~10-micron electrode, ensuring that the measured electrochemical response is isolated to that single particle. Through cycling many individual NMC particles, we found that smaller particles are no faster than larger particles, which is in stark contradiction to the prevailing Newman model. The reason is that these larger polycrystalline particles crack during the first cycle, enabling electrolyte penetration. Moreover, we show that single-crystal NMC particles are unable to undergo fast charging in the absence of cracking, making them potentially unsuitable for automotive applications. These results show substantial promise in using microelectrode arrays for understanding and designing battery materials.
Students are encouraged to present posters. Up to three posters will be selected for presentation at this event. The first three students to email us at email@example.com about presenting their work at the seminar receive $100 and one year of free access to Detroit section events.
Title: “Innovative materials and electrochemical technologies in solid oxide fuel cell, solid state battery, and other electrochemical devices”
Speaker: Dr. Yiyang Li
Assistant Professor of Materials Science and Engineering
University of Michigan
Date: Thursday, January 25, 2024
Schedule: 1800h Posters and Dinner | 1900h Speaker
Location: Mercedes-Benz Research & Development North America, Inc.
35555 W. 12 Mile Road
Farmington Hills, MI 48331-3139
Professionals: USD $20
Students: USD $10
Student Presenters – $0
Registration includes dinner
Pre-registration is required.
Registration deadline: Wednesday, January 24, 2024
About Dr. Yiyang Li
Dr. Yiyang Li is Assistant Professor of Materials Science and Engineering at the University of Michigan. His research group studies ionic transport processes in materials for energy storage and for microelectronics. He received his BS in Electrical Engineering at Olin College, PhD in Materials Science and Engineering at Stanford University (2016), and was a Harry Truman Fellow at Sandia National Laboratories. He received the Intel Rising Star Faculty Award in 2022.