Constitutive equations for self-limiting lithiation of electrode nanoparticles in Li-ion batteries

A. D. Drozdov

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Constitutive equations are developed for the viscoplastic response of a host medium induced by diffusion of guest atoms. These relations are applied to analyze formation of stresses in spherical electrode particles under lithiation. Ability of the model to describe basic phenomena observed in experiments (formation of a sharp interphase between a Li-poor core and a Li-rich shell, growth of tensile hoop stresses at the outer surface of a particle leading to its fracture, and slowing down of the interphase motion) is revealed by numerical simulation. Good agreement is demonstrated between observations on interphase propagation in amorphous silicon nanoparticles and predictions of the model.

Original languageEnglish
Pages (from-to)67-73
Number of pages7
JournalMechanics Research Communications
Volume57
DOIs
StatePublished - 1 Jan 2014
Externally publishedYes

Keywords

  • Lithium ion battery
  • Modeling
  • Stress-induced diffusion
  • Viscoplasticity

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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