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A coupled electrochemomechanical model for the cycling of a Cu15Si4-hosted silicon nanowire
Date
2022
Abstract
In this paper, we present and analyse a coupled electrochemomechanical model for the cycling of a nanowire composed of amorphous Si coated on Cu15Si4, using large-deformation theory. This study is motivated by a recent novel design for the anode current collector in a lithium-ion battery, and the modelling efforts are linked to half-cell experiments at three different charging rates (C/10,C/2,2C). The model predicts that nanowire buckling should occur on the first charging cycle, and this agrees with the appearance of fracturing on the corresponding transmission electron microscopy image. In addition, the model predicts some new behaviours that were not discussed in earlier electrochemomechanical models of similar type; among these is the possibility that the electrode may locally reach full charge first in its interior, rather than at its outer surface.
Supervisor
Description
peer-reviewed
Publisher
Elsevier
Citation
Journal of Power Sources;529, 231197
Files
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Devine_2022_A-Coupled.pdf
Adobe PDF, 1.54 MB
Keywords
Funding code
Funding Information
Horizon 2020, European Research Council (ERC)
Sustainable Development Goals
External Link
Type
Article
Rights
https://creativecommons.org/licenses/by-nc-sa/1.0/