About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage VII
|
Presentation Title |
Simulations of Phase Transformation in Complex Graphite Electrode Microstructures |
Author(s) |
Affan Malik, Kent Snyder, Minghong Liu, Hui-Chia Yu |
On-Site Speaker (Planned) |
Affan Malik |
Abstract Scope |
Phase transformations occur in several electrode materials (e.g., graphite anode and LiCoO2 cathode) of Li-ion batteries during (de)intercalation. The process of (de)lithiation phase transformation determines the cell performance during operations. In this work, we present a framework for simulating phase transformations and investigating the dynamics in complex porous electrode microstructures. The Cahn-Hilliard equation is employed to model the phase transformations induced by Li insertion/extraction. The Smoothed Boundary Method is utilized to circumvent the challenge of generating conformal meshes on the complex porous microstructures for simulations. Experimentally measured material properties and reconstructed 3D graphite anodes are used in the simulations, establishing a bridge between experiments and simulations. Anisotropic Li diffusion in the graphite particles is considered in the simulations as well. The simulations reveal the phase transformation dynamics in the complex porous electrodes at different cycling rates and how they affect the cell’s performance. |
Proceedings Inclusion? |
Planned: |