Electrochemical Kinetics of SEI Growth on Carbon Black: Part I. Experiments
Name
J. Electrochem. Soc.-2019-Attia-E97-E106.pdf
Description
Published version
Size
3.47 MB
Format
Adobe PDF
Checksum (MD5)
27d016ab03ce33d015ff8e4fa4a8aefd
Author(s)
Attia, Peter M
Das, Supratim
Harris, Stephen J
Bazant, Martin Z
Chueh, William C
Date Issued
2019
Journal
Journal of The Electrochemical Society
Publisher
The Electrochemical Society
Version
Final published version
Abstract
© 2019 The Electrochemical Society. Growth of the solid electrolyte interphase (SEI) is a primary driver of capacity fade in lithium-ion batteries. Despite its importance to this device and intense research interest, the fundamental mechanisms underpinning SEI growth remain unclear. In Part I of this work, we present an electroanalytical method to measure the dependence of SEI growth on potential, current magnitude, and current direction during galvanostatic cycling of carbon black/Li half cells.We find that SEI growth strongly depends on all three parameters; most notably, we find SEI growth rates increase with nominal C rate and are significantly higher on lithiation than on delithiation. We observe this directional effect in both galvanostatic and potentiostatic experiments and discuss hypotheses that could explain this observation. This work identifies a strong coupling between SEI growth and charge storage (e.g., intercalation and capacitance) in carbon negative electrodes.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1149/2.0231904JES
