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Abstract

One of the biggest problems developing high gravimetric and volumetric energy density materials for lithium ion batteries is the deformation caused failure during charge/discharge cycling. Periodic intercalation and deintercalation of Lithium into/from the electrode material lead to expansion and shrinkage that results in loss of contact between the charge collector and the electrode as well as crack growth in the electrode material itself. Both processes mean capacity loss and finally failure of the total battery system.

To approach this problem, a large deformation model is needed, that is capable of simulating these processes quantitatively. In this talk we present the first step towards such a model, that is implementing an advection scheme into the OpenPhase software framework and explain the numerical methods, that have been used. The resulting approach is used to calculate lithium intercalation into a FePO₄ particle and the obtained results are presented.