A constitutive model coupling irradiation with two-phase lithiation for lithium-ion battery electrodes

Abstract

When lithium-ion batteries serve in extreme environments like space, severe irradiation might induce significant decay of the electrochemical performances and mechanical properties. In this paper, an electrochemical-irradiated constitutive model is proposed to explore the evolution of dislocation, defect and stress in electrodes during a twophase lithiation process. The results from the analytic formulation and finite difference calculations show that, as Li intercalation proceeding, the hoop stress in the surface of a spherical particle converts from compression into tension because the large lithiation strain and plastic yielding at the front pushes out the material behind it. And the plastic flow resistance continuously increases with increasing irradiation dose result from the impediment of a defect to dislocation glide. There is a clear peak in the distribution of stress at yielding locations due to the competition between dislocations multiplication and defects annihilation. The model is meaningful for thoroughly understanding the micro-mechanism of lithiation deformation and provides a guideline for predicting their mechanical behaviours of lithium-ion batteries in unconventional environment.

Surface-Functionalized Separator for Stable and Reliable Lithium Metal Batteries: A Review

“…All of these unwanted phenomena become even more serious when LMBs are operating under abuse conditions, i.e., high/low temperature, high current density, and overcharging. Especially, these topics are of importance since they can directly affect the safety of our lives [ 38 , 39 , 40 , 41 ].…”

A First Molecular Dynamics Study for Modeling the Microstructure and Mechanical Behavior of Si Nanopillars during Lithiation

“…Initial mechanics studies employed linear elasticity and linear fracture mechanics , for capturing the stresses developed in anode particles experiencing volume expansions over 300%. Since then, computational simulations have been widely used to model the stress generation, anisotropic volume expansions, and fracture of Si by using chemo-mechanical models implemented in the finite element method, , phased field modeling, and atomistic simulation . Chemomechanical finite element modeling showed that hollow amorohousSiNPs (a-SiNPs) have a lower stress-induced barrier of lithiation than solid a-SiNPs .…”

Comparison and study of the preparation methods for phosphor layer in nuclear battery

“…However, there was little work that investigated the micromorphology, optical, and electrical properties of ZnS:(Cu, Al) phosphors after high‐dose electron radiation. The combination of simulation and experiment is a suitable method to analyze the effect of radioactive particles on materials 28,29 . It is meaningful for exploring the performance changes and micromechanism of energy conversion section after radiation in batteries, providing important guideline for predicting battery service behavior.…”