Simulation of crack behavior of secondary particles in Li-ion battery electrodes during lithiation/de-lithiation cycles
The loss of connectivity in particle-based LiMO2 (M = Ni, Co, Al, and/or Mn) electrodes due to mechanical failure
and fracture at the interface between primary particles is one of the major causes of capacity fading in Li-ion
batteries (LIBs) after certain electrochemical cycles. In this study, a model of a secondary particle composed
of randomly distributed primary particles is established using a fractal algorithm. The finite element method
with cohesive crack modeling is employed to simulate the intraparticle fracture within the secondary particle.