MS. Thesis Defense: Sergio Baron
Wednesday, August 1, 2012
3:30 p.m. Room 1146, AVW Bldg.
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ANNOUNCEMENT: MS. Thesis Defense
Name: Sergio Baron
Professor Reza Ghodssi, Chair/Advisor
Professor Martin Peckerar
Professor Chunsheng Wang
Date/Time: Wednesday, August 1st, 2012, 3:30p.m.
Location: Room 1146, AVW Building
Title: A PLATFORM TOWARDS IN SITU STRESS/STRAIN MEASUREMENT IN LITHIUM ION BATTERY ELECTRODES
Abstract: This thesis demonstrates the design, fabrication and testing of a platform for in situ stress/strain measurement in lithium ion battery electrodes. The platform consisting of a Microelectromechanical System (MEMS) chip containing an electrochemical cavity and an optical sensing element, a custom electrochemical package and an experimental setup was successfully developed. Silicon was used as an active electrode material, and a thin-film electrochemical stack was conceived and tested. Finally, multiple experiments showed correlation between the active material volume change inside the battery and a signal change in the optical sensing element. The experimental results, combined with the MEMS implementation of the sensing element provide a promising way to evaluate electrochemical reaction-induced stress monitoring in a simple and compact fashion, while experiments are carried out in situ.