Zhe Liu1 Lei Chen3 Yue Qi2 Xingcheng Xiao4 Qinglin Zhang4 Long-Qing Chen1

1, The Pennsylvania State University, University Park, Pennsylvania, United States
3, Mississippi State University, Mississippi State, Mississippi, United States
2, Michigan State University, East Lansing, Michigan, United States
4, General Motors Research and Development Center, Warren, Michigan, United States

The recent attempts to model the Li-dendrite formation using the phase-field method will be briefly reviewed. We will start with a nonlinear phase-field model for Li dendrite growth in Li metal/liquid electrolyte binary systems accounting for the Butler-Volmer electrochemical reaction kinetics. The dendritic patterns are examined as a function of applied voltage and initial electrode surface morphology. Then we further advance our phase field model by implicitly incorporating the effect of a solid electrolyte interphase (SEI) layer (or any artificial electrode protective coating layers). The impacts of key SEI properties (e.g. Li ion diffusion coefficient, interfacial energy anisotropy, charge transfer barrier, etc.) on Li plating and dendrite formation will be discussed. We will then introduce a multiphase multigrain phase-field model of Li electrodeposition at a Li metal anode in polycrystalline solid electrolyte, based on which the Li dendrite growth and nucleation mechanisms will be examined in terms of solid electrolyte electro-chemical-mechanical properties.