Dissertation Defense: The Impact of Meyer–Neldel Rule over Ion Transport Properties in Solid-state Electrolytes

Date: 2023/05/15 - 2023/05/15

Dissertation Title: The Impact of Meyer–Neldel Rule over Ion Transport Properties in Solid-state Electrolytes

Speaker: Yirong Gao, Ph.D. candidate at UM-SJTU Joint Institute

Time: May 15th from 12:00 a.m., 2023 (Beijing Time)

Location: Room 202, GIFT Building

Abstract

Solid-state batteries are a promising technology for energy storage. The key to developing high-performance solid-state electrolytes is to clarify how to achieve high ionic conductivity. The conventional approach to increase the ionic conductivity is to decrease the activation energy based on Arrhenius relation. However, the prefactor term is an important term that has been neglected in optimizing the ionic conductivity of solid-state electrolytes. The introduction of the Meyer–Neldel rule, which correlates activation energy and prefactor, enables us to quantitatively translate the effect of material structure on the prefactor to activation energy. In this dissertation, a systematic study of the role Meyer–Neldel rule in ion transport from the view of theory, measurement approach and mechanism has been presented. In summary, this doctoral dissertation has important theoretical and methodological significance for understanding the mechanism of ion transport optimizing the performance of solid-state electrolytes.

Biography

Yirong Gao received her B.S. degree in the Department of Materials Science and Engineering, Central South University of Forestry and Technology in 2014 and M.S. degree in Materials Science and Engineering from Wuhan University of Technology in 2017. She is currently a Ph.D. candidate at University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, supervised by Prof. Shou-Hang Bo. Her research is focused on the ionic transport mechanism of lithium superionic conductors.