04/01/2022
By Sokny Long

The Francis College of Engineering, Department of Mechanical Engineering, invites you to attend a doctoral proposal defense by Xiting Duan on “EIS Diagnosis of Lithium-Ion Battery through a Combined Experimental and Modeling Approach.”

Candidate Name: Xiting Duan
Date: Thursday, April 14, 2022
Time: 1 to 3 p.m EST
Location: This will be a virtual defense via Zoom. Those interested in attending should contact Xiting_Duan@student.uml.edu and committee advisor, Xinfang_Jin@uml.edu, at least 24 hours prior to the defense to request access to the meeting.

Committee Chair (Advisor): Xinfang Jin, Assistant Professor, Department of Mechanical Engineering, University of Massachusetts Lowell

Committee Members

  • Fuqiang Liu, Associate Professor, Department of Mechanical Engineering, University of Massachusetts Lowell
  • Ertan Agar, Assistant Professor, Department of Mechanical Engineering, University of Massachusetts Lowell
  • Kwok-Fan Chow, Associate Professor, Department of Chemistry, University of Massachusetts Lowell

Brief Abstract:

Nondestructive, quick, and accurate diagnosis of Lithium-ion batteries are critical tools to extend battery lifetime and ensure safe operation under complicated real-time power demand conditions. In this work, an electrochemical characterization approach coupling impedance spectroscopy with a physics-based model (EIS-Physical) has been demonstrated to accurately identify key transport and kinetic parameters. First, we focus on the parameters identification for Li(Ni0.5Mn0.3Co0.2)O2/Li-metal half-cell at different SOCs, and the results show cathode Li-ion diffusivity and cathode/electrolyte exchange current density are quadratic functions of xLi. Future work will extend this method to investigate the change of transport and kinetic parameters for Li(Ni0.5Mn0.3Co0.2)O2/Graphite full-cell and the parameters change in cycle degradation.

All interested students and faculty members are invited to attend the online defense via remote access.