Microstructure Scale Lithium-Ion Battery Modeling: Part II. On In-Plane Heterogeneities and the Mechanisms that Regulate Them Article Swipe

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Francois L. E. Usseglio‐Viretta , Jeffery M. Allen , Andrew M. Colclasure , Donal P. Finegan , Peter Gräf , Peter J. Weddle , Kandler Smith · YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.1149/1945-7111/ae04a2

Li-ion batteries performance and degradation are typically modeled at the macroscopic scale, that is neglecting in-plane heterogeneities that can arise from non-uniform electrode microstructures. Herein, a microstructure scale electrochemical model is used to quantify the impact of microstructure heterogeneity on cell performance during fast charging. The model predicts the electrolyte and solid concentration in-plane standard deviation can reach, respectively, ≈200 mol·m −3 and 6–7 kmol·m −3 locally. Further, the intercalation current density i n-plane relative standard deviation can reach extremely high values, around 100% in the cathode and well above 100% in the anode graphite. These denote highly non-uniform lithiation rates and material utilization within each slice of the microstructure along the cell thickness. Non-uniform curvatures, at the particle scale (surface roughness) and between particles (size distribution), were found to initiate these in-plane heterogeneities, while an OCP-induced mechanism subsequently regulates them. The present model provides new insights into small length scale heterogeneity impact on battery performance not available with standard macro-scale/P2D modeling.

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article

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en

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https://doi.org/10.1149/1945-7111/ae04a2

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hybrid

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https://doi.org/10.1149/1945-7111/ae04a2

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Microstructure Scale Lithium-Ion Battery Modeling: Part II. On In-Plane Heterogeneities and the Mechanisms that Regulate Them

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article

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en

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2025

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2025-09-01

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Francois L. E. Usseglio‐Viretta, Jeffery M. Allen, Andrew M. Colclasure, Donal P. Finegan, Peter Gräf, Peter J. Weddle, Kandler Smith

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https://doi.org/10.1149/1945-7111/ae04a2

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https://doi.org/10.1149/1945-7111/ae04a2

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30

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10

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