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Phase-field Modeling of Phase Changes and Mechanical Stresses in Electrode Particles of Secondary Batteries
Tao Zhang
2021
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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.
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Keywords
- Endliche Verformungselastizität
- Finite deformation elasticity
- Mechanical engineering & materials
- Nichtlokalität
- nonlocality
- Phase segregation
- phase-field approach
- Phasenfeldansatz
- Phasentrennung
- Secondary batteries
- Sekundärbatterien
- Technology, engineering, agriculture
Links
DOI: 10.5445/KSP/1000100537Editions