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The electro-chemo-mechanical coupling in lithium alloy electrodes and its origins
Citation Link: https://doi.org/10.15480/882.2253
Publikationstyp
Journal Article
Date Issued
2015-10-09
Sprache
English
Author(s)
TORE-DOI
TORE-URI
Volume
162
Issue
14
Start Page
A2684
End Page
A2691
Citation
Journal of the Electrochemical Society 14 (162): A2684-A2691 (2015-10-09)
Publisher DOI
Scopus ID
Publisher
Electrochemical Soc.
A method to identify and separate the influence of changes in the surface stress from the bulk stress in a model lithium-ion battery electrode during electrochemical cycling was developed. The strategy for this separation is based on the different influence of surface and bulk stresses on the coupling between electrode potential and mechanical strain as measured by dynamic electro-chemo-mechanical analysis and the coupling between the transferred electric charge and the elastic strain as determined by wide angle X-ray scattering. Using both methods, it was possible to uncover the behavior of an apparent surface stress evoked by the bulk stress due to grain boundary alloying of lithium in a gold film. Additionally, the analysis allowed for a determination of a range in surface stress due to underpotential deposition of one monolayer of lithium as the interval between -3.1 to -1.9 N/m.
DDC Class
600: Technik
620: Ingenieurwissenschaften
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