Classification of spatio-temporal patterns in charging and discharging of Li-ion batteries

Moshe Sheintuch; Olga Nekhamkina

doi:10.1002/aic.17861

Classification of spatio-temporal patterns in charging and discharging of Li-ion batteries

Moshe Sheintuch^*, Olga Nekhamkina

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We classify the dynamic patterns that emerge in charging or discharging of Li-ion batteries, under galvanostatic conditions, using simulations of the two-phase one-dimensional (1D) porous electrode model. This work examines the effect of the exchange current function, R₀(X), which expresses the nature of kinetics. This extends our previous study with R₀ = 1 where the same pattern emerges in charging or discharging, whether as a homogeneous or a step-wise process made of multiple symmetry breaking events. With commonly-used asymmetric R₀(X), the emerging patterns may be one of the two above or as fronts that follow single SB event and the lithiation/delithiation behaviors are different. These effects are clear when parameters are uniform; nonuniformity leads to noise that mask the behavior. The full four-variable model exhibits SB, even in absence of noise, since the liquid potential gradient ((Formula presented.)) works like a perturbation. This similarity allows us to derive approximations to the full model behavior.

Original language	English
Article number	e17861
Journal	AICHE Journal
Volume	69
Issue number	3
DOIs	https://doi.org/10.1002/aic.17861
State	Published - Mar 2023
Externally published	Yes

Keywords

electrochemistry
process
reactor analysis
simulation

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10.1002/aic.17861

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title = "Classification of spatio-temporal patterns in charging and discharging of Li-ion batteries",

abstract = "We classify the dynamic patterns that emerge in charging or discharging of Li-ion batteries, under galvanostatic conditions, using simulations of the two-phase one-dimensional (1D) porous electrode model. This work examines the effect of the exchange current function, R0(X), which expresses the nature of kinetics. This extends our previous study with R0 = 1 where the same pattern emerges in charging or discharging, whether as a homogeneous or a step-wise process made of multiple symmetry breaking events. With commonly-used asymmetric R0(X), the emerging patterns may be one of the two above or as fronts that follow single SB event and the lithiation/delithiation behaviors are different. These effects are clear when parameters are uniform; nonuniformity leads to noise that mask the behavior. The full four-variable model exhibits SB, even in absence of noise, since the liquid potential gradient ((Formula presented.)) works like a perturbation. This similarity allows us to derive approximations to the full model behavior.",

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author = "Moshe Sheintuch and Olga Nekhamkina",

note = "Publisher Copyright: {\textcopyright} 2022 American Institute of Chemical Engineers.",

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AU - Sheintuch, Moshe

AU - Nekhamkina, Olga

PY - 2023/3

Y1 - 2023/3

N2 - We classify the dynamic patterns that emerge in charging or discharging of Li-ion batteries, under galvanostatic conditions, using simulations of the two-phase one-dimensional (1D) porous electrode model. This work examines the effect of the exchange current function, R0(X), which expresses the nature of kinetics. This extends our previous study with R0 = 1 where the same pattern emerges in charging or discharging, whether as a homogeneous or a step-wise process made of multiple symmetry breaking events. With commonly-used asymmetric R0(X), the emerging patterns may be one of the two above or as fronts that follow single SB event and the lithiation/delithiation behaviors are different. These effects are clear when parameters are uniform; nonuniformity leads to noise that mask the behavior. The full four-variable model exhibits SB, even in absence of noise, since the liquid potential gradient ((Formula presented.)) works like a perturbation. This similarity allows us to derive approximations to the full model behavior.

AB - We classify the dynamic patterns that emerge in charging or discharging of Li-ion batteries, under galvanostatic conditions, using simulations of the two-phase one-dimensional (1D) porous electrode model. This work examines the effect of the exchange current function, R0(X), which expresses the nature of kinetics. This extends our previous study with R0 = 1 where the same pattern emerges in charging or discharging, whether as a homogeneous or a step-wise process made of multiple symmetry breaking events. With commonly-used asymmetric R0(X), the emerging patterns may be one of the two above or as fronts that follow single SB event and the lithiation/delithiation behaviors are different. These effects are clear when parameters are uniform; nonuniformity leads to noise that mask the behavior. The full four-variable model exhibits SB, even in absence of noise, since the liquid potential gradient ((Formula presented.)) works like a perturbation. This similarity allows us to derive approximations to the full model behavior.

KW - electrochemistry

KW - process

KW - reactor analysis

KW - simulation

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Classification of spatio-temporal patterns in charging and discharging of Li-ion batteries

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Keywords

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