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Title: Nonlinear Phase Field Model for Electrodeposition in Electrochemical systems

Abstract

A nonlinear phase-field model has been developed for describing the electrodeposition process in electrochemical systems that are highly out of equilibrium. Main thermodynamic driving forces for the electrode-electrolyte interface (EEI) evolution are limited to local variations of overpotential and ion concentration. Application of the model to Li-ion batteries describes the electrode interface motion and morphology change caused by charge mass transfer in the electrolyte, an electrochemical reaction at the EEI and cation deposition on the electrode surface during the charging operation. The Li electrodeposition rate follows the classical Butler-Volmer kinetics with exponentially and linearly depending on local overpotential and cation concentration at the electrode surface, respectively. Simulation results show that the Li deposit forms a fiber-like shape and grows parallel to the electric field direction. The longer and thicker deposits are observed both for higher current density and larger rate constant where the surface reaction rate is expected to be high. The proposed diffuse interface model well captures the metal electrodeposition phenomena in plenty of non-equilibrium electrochemical systems.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1395987
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 105; Journal Issue: 26; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
Li-ion batteries; Nonlinear; electrodeposition; phase-field

Citation Formats

Liang, Linyun, and Chen, Long-Qing. Nonlinear Phase Field Model for Electrodeposition in Electrochemical systems. United States: N. p., 2014. Web. doi:10.1063/1.4905341.
Liang, Linyun, & Chen, Long-Qing. Nonlinear Phase Field Model for Electrodeposition in Electrochemical systems. United States. https://doi.org/10.1063/1.4905341
Liang, Linyun, and Chen, Long-Qing. 2014. "Nonlinear Phase Field Model for Electrodeposition in Electrochemical systems". United States. https://doi.org/10.1063/1.4905341.
@article{osti_1395987,
title = {Nonlinear Phase Field Model for Electrodeposition in Electrochemical systems},
author = {Liang, Linyun and Chen, Long-Qing},
abstractNote = {A nonlinear phase-field model has been developed for describing the electrodeposition process in electrochemical systems that are highly out of equilibrium. Main thermodynamic driving forces for the electrode-electrolyte interface (EEI) evolution are limited to local variations of overpotential and ion concentration. Application of the model to Li-ion batteries describes the electrode interface motion and morphology change caused by charge mass transfer in the electrolyte, an electrochemical reaction at the EEI and cation deposition on the electrode surface during the charging operation. The Li electrodeposition rate follows the classical Butler-Volmer kinetics with exponentially and linearly depending on local overpotential and cation concentration at the electrode surface, respectively. Simulation results show that the Li deposit forms a fiber-like shape and grows parallel to the electric field direction. The longer and thicker deposits are observed both for higher current density and larger rate constant where the surface reaction rate is expected to be high. The proposed diffuse interface model well captures the metal electrodeposition phenomena in plenty of non-equilibrium electrochemical systems.},
doi = {10.1063/1.4905341},
url = {https://www.osti.gov/biblio/1395987}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 26,
volume = 105,
place = {United States},
year = {Mon Dec 29 00:00:00 EST 2014},
month = {Mon Dec 29 00:00:00 EST 2014}
}

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