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Publisher DOI: 10.1149/2.0461514jes
Title: The electro-chemo-mechanical coupling in lithium alloy electrodes and its origins
Language: English
Authors: Kitzler, Tobias 
Maawad, Emad 
Többens, Daniel M. 
Ziehmer, Markus 
Markmann, Jürgen 
Issue Date: 9-Oct-2015
Publisher: Electrochemical Soc.
Source: Journal of the Electrochemical Society 14 (162): A2684-A2691 (2015-10-09)
Journal or Series Name: Journal of the Electrochemical Society : JES 
Abstract (english): 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.
DOI: 10.15480/882.2253
ISSN: 1945-7111
Institute: Werkstoffphysik und -technologie M-22 
Type: (wissenschaftlicher) Artikel
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