Numerical Solution of Moving Phase Boundary and Diffusion-Induced Stress of Sn Anode in the Lithium-Ion Battery
Abstract
Here, we have previously observed a large transient stress in Sn film anodes at the beginning of the Sn-Li2Sn5 phase transformation. To understand this behavior, we use numerical modeling to simulate the kinetics of the 1-D moving boundary and Li diffusion in the Sn anodes. A mixture of diffusion-controlled and interface-controlled kinetics is found. The Li concentration in the Li2Sn5 phase remains near a steady-state profile as the phase boundary propagates, whereas the Li diffusion in Sn is more complicated. Li continuously diffuses into the Sn layer and produces a supersaturation; the Li can then diffuse toward the Sn/Li2Sn5 interface and contribute to further phase transformation. Finally, the evolution of Li concentration in the Sn induces strain which involves rate-dependent plasticity and elastic unloading, resulting in the complex stress evolution that is observed. In the long term, the measured stress is dominated by the stress in the growing Li2Sn5 phase.
- Authors:
-
- Brown Univ., Providence, RI (United States). School of Engineering
- Publication Date:
- Research Org.:
- Brown Univ., Providence, RI (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1425631
- Grant/Contract Number:
- SC0007074
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the Electrochemical Society
- Additional Journal Information:
- Journal Volume: 164; Journal Issue: 11; Journal ID: ISSN 0013-4651
- Publisher:
- The Electrochemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; diffusion-induced stress; finite-difference method; Li-ion battery; Sn anode
Citation Formats
Chen, Chun-Hao, Chason, Eric, and Guduru, Pradeep R. Numerical Solution of Moving Phase Boundary and Diffusion-Induced Stress of Sn Anode in the Lithium-Ion Battery. United States: N. p., 2017.
Web. doi:10.1149/2.0661711jes.
Chen, Chun-Hao, Chason, Eric, & Guduru, Pradeep R. Numerical Solution of Moving Phase Boundary and Diffusion-Induced Stress of Sn Anode in the Lithium-Ion Battery. United States. https://doi.org/10.1149/2.0661711jes
Chen, Chun-Hao, Chason, Eric, and Guduru, Pradeep R. Wed .
"Numerical Solution of Moving Phase Boundary and Diffusion-Induced Stress of Sn Anode in the Lithium-Ion Battery". United States. https://doi.org/10.1149/2.0661711jes. https://www.osti.gov/servlets/purl/1425631.
@article{osti_1425631,
title = {Numerical Solution of Moving Phase Boundary and Diffusion-Induced Stress of Sn Anode in the Lithium-Ion Battery},
author = {Chen, Chun-Hao and Chason, Eric and Guduru, Pradeep R.},
abstractNote = {Here, we have previously observed a large transient stress in Sn film anodes at the beginning of the Sn-Li2Sn5 phase transformation. To understand this behavior, we use numerical modeling to simulate the kinetics of the 1-D moving boundary and Li diffusion in the Sn anodes. A mixture of diffusion-controlled and interface-controlled kinetics is found. The Li concentration in the Li2Sn5 phase remains near a steady-state profile as the phase boundary propagates, whereas the Li diffusion in Sn is more complicated. Li continuously diffuses into the Sn layer and produces a supersaturation; the Li can then diffuse toward the Sn/Li2Sn5 interface and contribute to further phase transformation. Finally, the evolution of Li concentration in the Sn induces strain which involves rate-dependent plasticity and elastic unloading, resulting in the complex stress evolution that is observed. In the long term, the measured stress is dominated by the stress in the growing Li2Sn5 phase.},
doi = {10.1149/2.0661711jes},
journal = {Journal of the Electrochemical Society},
number = 11,
volume = 164,
place = {United States},
year = {Wed Aug 02 00:00:00 EDT 2017},
month = {Wed Aug 02 00:00:00 EDT 2017}
}
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