Phase-field Modeling of Phase Changes and Mechanical Stresses in Electrode Particles of Secondary Batteries
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Beschreibung
Most storage materials exhibit phase changes, which cause stresses and, thus, lead to damage of the electrode particles. In this work, a phase-field model for the cathode material NaxFePO4 of Na-ion batteries is studied to understand phase changes and stress evolution. Furthermore, we study the particle size and SOC dependent miscibility gap of the nanoscale insertion materials. Finally, we introduce the nonlocal species concentration theory, and show how the nonlocality influences the results.
Autor*in
Tao Zhang
Themen in »Phase-field Modeling of Phase Changes and Mechanical Stresses in Electrode Particles of Secondary Batteries«
Phasenfeldansatz Phasentrennung Nichtlokalität Endliche Verformungselastizität Sekundärbatterien Phase-field approach Phase segregation Nonlocality Finite deformation elasticity Secondary batteries