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oapen-20.500.12657-509922021-10-14T02:46:10Z Phase-field Modeling of Phase Changes and Mechanical Stresses in Electrode Particles of Secondary Batteries Zhang, Tao Phasenfeldansatz Phasentrennung Nichtlokalität Endliche Verformungselastizität Sekundärbatterien Phase-field approach Phase segregation Nonlocality Finite deformation elasticity Secondary batteries bic Book Industry Communication::T Technology, engineering, agriculture::TG Mechanical engineering & materials 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. 2021-10-13T13:54:04Z 2021-10-13T13:54:04Z 2021 book ONIX_20211013_9783731510024_43 2192-9963 9783731510024 https://library.oapen.org/handle/20.500.12657/50992 eng Schriftenreihe des Instituts für Angewandte Materialien, Karlsruher Institut für Technologie application/pdf n/a 9783731510024.pdf KIT Scientific Publishing KIT Scientific Publishing 10.5445/KSP/1000100537 10.5445/KSP/1000100537 44e29711-8d53-496b-85cc-3d10c9469be9 9783731510024 KIT Scientific Publishing 87 224 Karlsruhe open access
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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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