Speaker: Christos A. Mademlis, Electrical Engineer, M.Sc., Ph.D. 

Date: Friday, December 1, 2023

Time: 5:00PM

Venue: Museum Lecture Hall

Description:

In the last decade, the lithium-ion battery technology has exhibited significant progress on both material and control, becoming the most widespread solution for energy storage systems such as electric vehicles, mobile phones, and microgrids. Electric vehicles are continuously improved, so as they can completely replace the conventional internal combustion engine vehicles in the near future. However, the energy autonomy and the charging time are considered the two main factors that limit their widespread commercialization. To overcome those limitations, electric vehicles should be equipped with batteries of higher energy density and in relation to the fast-charging capabilities, the material technology should be significantly improved.

It is well known that the capability for fast charging of the lithium-ion batteries is mainly confined by the lithium plating (LP) phenomenon that is a side reaction on the negative graphite electrode. The LP may be owed to the limited intercalation reaction rate at the graphite/electrolyte interface, the limited ion transport in the electrolyte and the solid-state diffusion limitations in graphite particles. In this lecture, a new LP detection method for lithium-ion batteries is presented that can be applied during a constant-current-constant-voltage (CCCV) charging process and along with the voltage relaxation profile (VRP) technique constitute an effective and easy-to-use non-destructive tool.