EAN: 9783731510024

PHASE-FIELD MODELING OF PHASE CHANGES AND MECHA...

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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