Degradation Mechanisms at Interfaces between Emerging Anodes and Electrolytes in Lithium-Ion Batteries
Date: 2022/05/27 - 2022/05/27
Dissertation Title: Degradation Mechanisms at Interfaces between Emerging Anodes and Electrolytes in Lithium-Ion Batteries
Speaker: Yifan Wu, Ph.D. candidate at UM-SJTU Joint Institute
Time: 8:00 a.m., May 27th, 2022 ( Beijing Time)
Location: via feishu
Abstract: Till today, lithium-ion batteries have dominated the market of consumer electronics due to their high energy density, high operating voltage and low self-discharge rate. However, emerging application scenarios are proposing higher demands on energy storage systems. It is urgent to investigate degradation mechanisms of lithium-ion batteries to improve their durability, reliability and energy density. While most degradation processes occur at interfaces, we investigated interface degradation processes between emerging anodes and electrolytes. Electrochemical degradation between Li2TiSiO5 anode and liquid electrolyte, electrochemical degradation between lithium metal anode and liquid electrolyte, electrochemical degradation between lithium metal anode and solid electrolyte, and electrochemo-mechanical degradation between lithium metal anode and solid electrolyte were studied. Different interfacial processes dominating battery degradation were distinguished with careful characterizations, providing future directions for optimization.
Yifan Wu received his B.S. degree from Southeast University and M.Sc. degree from Delft University of Technology (Netherlands). He has been working towards a Ph.D. degree since 2017 under supervision of Prof. Shouhang Bo, Shanghai Jiao Tong University. His research focuses on interfacial processes in lithium-ion batteries.