Poster De Conférence Année : 2025

Investigation of a modified P2D-Newman’s model for predicting lithiation heterogeneities

Étude d’un modèle modifié de P2D-Newman pour la prédiction des hétérogénéités de lithiation

Résumé

Lithium-ion batteries are currently the most widely adopted technology for energy storage applications. The electrochemical performance of a cell relies solely on the intrinsic material properties and the electrode microstructure. If the material properties cannot be tuned, the one related to the electrode microstructure can be modified influencing then the transport properties within the electrode. Understanding the relationship between the electrode engineering, microstructure, and transport properties is crucial for developing better batteries especially for fast charging application. The Doyle-Fuller-Newman pseudo-2D (P2D) model is widely used in the field of Li-ion batteries. This physico-chemical model is based on fundamental equations describing migration and diffusion processes in electrolyte as well as charge-transfer reaction and ion intercalation. Moreover, modified P2D models have been developed to improve simulation accuracy while maintaining simplicity to save calculation time for charge and discharge at small and large regimes compared to a 3D model. Prediction of local lithium concentration across the electrode thickness as a function of electrode material properties is crucial to improve cycling performance. Heterogeneous electrolyte potential and lithium distribution inside Li-ion batteries highly effect their performance and durability. In thick electrode, due to lithium diffusion across the depth of the electrode, gradient concentration increases at high C-rate. Quantifying and investigating lithiation heterogeneities, depending on the electrode parameters, allow a better understanding of the different aging mechanisms. The modified P2D model presented in this work was developed to simulate the lithiation process inside a porous graphite electrode and the lithium heterogeneity along the geometry of a half-cell (graphite vs. Li metal).

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Dates et versions

hal-04970758 , version 1 (28-02-2025)

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  • HAL Id : hal-04970758 , version 1

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Pierre Hugon, Corentin Renais, Claire Villevieille, Mohammad Farkhondeh, Yann Bultel. Investigation of a modified P2D-Newman’s model for predicting lithiation heterogeneities. Groupe Français d'Etude des Composés et d'Insertion, Mar 2025, Sevrier, France. ⟨hal-04970758⟩
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