Abstract
In this study, we analyze the transient diffuse-induced-deformation of an electrode consisting of the conducting polymer polypyrrole (PPY) by using the theories of linear viscoelasticity and diffusion-induced stress. We consider two constitutive relationships with dependence of viscosity on strain rate: Kelvin-Voigt model and three-parameter solid model. A numerical method is used to solve the problem of one-dimensional, transient diffusion-induced-deformation under potentiostatic operation. The numerical results reveal that the maximum displacement occurs at the free surface and the maximum stress occurs at the fixed end. The inertia term causes the stress to increase at the onset of lithiation. The stress decreases with increasing lithiation time and approaches zero for prolonged lithiation. Compared with the two different constitutive relationships between the Kelvin-Viogt model and three-parameter solid model, it can be found that the spatiotemporal distribution of lithium ion concentrations in the Kelvin-Viogt model is larger than that in the three-parameter solid model at the same moment, whereas the stress of the Kelvin-Viogt model is smaller owing to more than one spring in the three-parameter solid model.
Document Type
Article
Publication Date
6-2019
Digital Object Identifier (DOI)
https://doi.org/10.1063/1.5052174
Funding Information
Y.S. is grateful for the support by NSFC (Grant No. 11402054), Natural Science Foundation of Fujian Provincial (Grant No. 2018J01663) and Scientific Research Program Funded by Fujian Provincial Education Commission (Grant No. JT180026). F.Y. is grateful for the support by the NSF through the grant CMMI-1634540, monitored by Dr. Khershed Cooper.
Repository Citation
Suo, Yaohong and Yang, Fuqian, "Transient Analysis of Diffusion-Induced Deformation in a Viscoelastic Electrode" (2019). Chemical and Materials Engineering Faculty Publications. 64.
https://uknowledge.uky.edu/cme_facpub/64
Included in
Chemical Engineering Commons, Materials Science and Engineering Commons, Mechanical Engineering Commons
Notes/Citation Information
Published in AIP Advances, v. 9, issue 6, 065111, p. 1-8.
© Author(s) 2019
All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).