Capturing the stress evolution in electrode materials that undergo phase transformations during electrochemical cycling

Bo Wang (1) , Julien Réthoré (2) , Katerina E Aifantis (1)

1 UF - University of Florida [Gainesville]
2 GeM - Institut de Recherche en Génie Civil et Mécanique

The present work sheds light on the stresses generated in a spherical particle subjected to phase transformations during ion-insertion. In order to account for the physical process that occur during electrochemical cycling, the models used are those of small deformation and account for the effects of phase transformation, chemo-mechanical coupling and concentration-dependent material properties. The two-phase lithiation is modeled by the Cahn-Hilliard equation.

Mots clés: Electrodes; Phase transformation; Chemo-mechanical coupling; Concentration-dependent elastic modulus

Domaines: Mécanique des solides [physics.class-ph]

Bo Wang, Julien Réthoré, Katerina E Aifantis. Capturing the stress evolution in electrode materials that undergo phase transformations during electrochemical cycling. International Journal of Solids and Structures, 2021, ⟨10.1016/j.ijsolstr.2021.03.019⟩. ⟨hal-03183921⟩