Modeling crack growth during Li extraction in storage particles using a fracture phase field approach

Markus Klinsmann, Daniele Rosato, Marc Kamlah, Robert M. McMeeking

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Storage particles of lithium ion batteries undergo significant mechanical stress during charging and discharging due to the inhomogeneous volume change within the particles when lithium is inserted and extracted. This stress potentially leads to fracture of the particles resulting in detrimental effects for the capacity and internal resistance of a lithium ion battery, such as the growth of additional solid electrolyte interface, loss of contact in conductive pathways or complete disintegration of the electrode. Here, we tackle the problem of fracture in storage particles by merging a coupled model of mechanical stress and diffusion of lithium ions with a phase field description of an evolving crack. This approach allows the simultaneous study of the evolution of the lithium concentration together with the growth of a crack without restrictions to specific geometries, simulation dimensions and presuppositions regarding the crack path. The model was successfully applied to study crack growth during lithium insertion in an earlier work. It was shown that inertia effects play a crucial role with respect to a possible fragmentation of the storage particles. Here, we focus on the opposite charging condition and examine the circumstances under which unstable crack growth and particle breakage can occur during lithium extraction.

Original languageEnglish
Pages (from-to)A102-A118
Number of pages17
JournalJournal of the Electrochemical Society
Volume163
Issue number2
Early online date9 Nov 2015
DOIs
Publication statusPublished - 2016

Fingerprint

Lithium
Crack propagation
cracks
lithium
Cracks
charging
electric batteries
Disintegration
Solid electrolytes
Merging
ions
solid electrolytes
disintegration
Ions
inertia
insertion
Electrodes
constrictions
fragmentation
Geometry

Keywords

  • lithium ion battery
  • phase field model for fracture
  • stable crack growth
  • storage particles
  • unstable crack growth

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

Modeling crack growth during Li extraction in storage particles using a fracture phase field approach. / Klinsmann, Markus; Rosato, Daniele; Kamlah, Marc; McMeeking, Robert M.

In: Journal of the Electrochemical Society, Vol. 163, No. 2, 2016, p. A102-A118.

Research output: Contribution to journalArticle

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