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Please use this identifier to cite or link to this item: http://hdl.handle.net/1903/13100

Title: A Platform Towards In Situ Stress/Strain Measurement in Lithium Ion Battery Electrodes
Authors: Baron, Sergio Daniel
Advisors: Ghodssi, Reza
Department/Program: Electrical Engineering
Type: Thesis
Sponsors: Digital Repository at the University of Maryland
University of Maryland (College Park, Md.)
Subjects: Electrical engineering
Keywords: Battery
In situ
Lithium
MEMS
Silicon
Stress
Issue Date: 2012
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.
URI: http://hdl.handle.net/1903/13100
Appears in Collections:UMD Theses and Dissertations
Electrical & Computer Engineering Theses and Dissertations

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