Stress evolution of thin film RuO₂ Li-ion battery electrodes
Name
1191824456-MIT.pdf
Size
1.97 MB
Format
Adobe PDF
Checksum (MD5)
e8945c080040800d7dd16c8befaf4868
Author(s)
Mills, Brian(Brian A.)
Advisor(s)
Carl Thompson and Joseph Checkelsky.
Date Issued
2020
Publisher
Massachusetts Institute of Technology
Abstract
Abstract Thin Film Li-ion batteries (TFB) are seen as a promising candidate for powering small, low power microelectronic devices as they exhibit high energy density and can operate reliably at low voltages. Currently the biggest obstacle to TFB battery development is high volume expansion and material degradation in electrodes with high theoretical Li ion capacities. Among these materials is RuO₂, which exhibits excellent capacity and great potential for use as either cathode or anode in low power electronics. In order to better understand the mechanisms that underlie mechanical failure in RuO₂, we perform the first in situ measurement of mechanical stress evolution in thin film RuO₂ electrodes. The results of these measurement reveal a very unique stress evolution pattern in RuO₂, which has not been observed or modeled in any previous experiment, exhibiting near zero stress delithiation and linear increase in stress during lithiation. These results point to a mode of failure of RuO₂ which does not occur in other materials currently being studied.
Description
Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 35-39).
Subjects
Physics.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
MIT theses may be protected by copyright. Please reuse MIT thesis content according to the MIT Libraries Permissions Policy, which is available through the URL provided.
Persistent DSpace Link
