Date of Award
August 2023
Degree Type
Dissertation
Degree Name
Doctor of Philosophy
Department
Engineering
First Advisor
Deyang Qu
Committee Members
Xiaoli Ma, Benjamin Church, Yonjin Sung, Illya Avdeev
Abstract
Dendrite growth is a major obstacle to the commercialization of Li metal batteries. A dendrite formed on a Li anode can cause thermal run-aways and permanent capacity loss. An in-situ optical techniques is considered as one of the major methods to study the dendrites growth behaviors and morphologies real-time. A home-designed in-situ optical cell with a digital optical microscope was used to investigate the behavior of Li deposition on a metallic Li electrode under different electrochemical operation conditions. The impacts of electrolytes, additives and cycling conditions on the dendrite formation were investigated. Guiding by the in-situ optical observation results, polycyclic aromatic hydrocarbons (PAHs) were introduced as additives to suppress the dendrite growth by forming a dynamic elastic protection layer and reacting with newly deposited dendrites. The in-situ observation method of solid-state electrolyte is also introduced.
Recommended Citation
Ding, Tianyao, "Dendrite Growth Suppression and In-Situ Surface Observation of Lithium Battery Under an Optical Microscope" (2023). Theses and Dissertations. 3256.
https://dc.uwm.edu/etd/3256