Abstract

Highly networked nanostructured battery electrode materials offer the possibility of achieving both rapid battery charge-discharge rates and high storage capacity. Recently, lithium ion battery (LIB) electrodes based on a 2-D honeycomb architecture were shown to undergo remarkable and reversible morphological changes during the lithiation process. Charge-discharge rates in 3-D composite electrode have also been shown to benefit from sandwiching the electrolytically active material between highly conductive ion and electron transport pathways to reduce electrical resistance and solid-state diffusion lengths. In the present work we simulate and analyze the observed morphological changes in honeycomb electrodes, with and without the presence of conductive pathways, during the lithiation-delithiation process. Diffusion induced stresses are analyzed for such structures undergoing elastic-plastic deformation during cycling. The results show that such a periodic, nanostructured electrode geometry allows for the presence of buckling-like deformation modes, which effectively reduce the resulting mechanical stresses that lead to electrode failure.

Original languageEnglish (US)
Pages (from-to)1103-1121
Number of pages19
JournalJournal of the Mechanics and Physics of Solids
Volume60
Issue number6
DOIs
StatePublished - Jun 1 2012

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buckling
Buckling
electric batteries
Electrodes
electrodes
elastic deformation
electrode materials
diffusion length
electrical resistance
Acoustic impedance
plastic deformation
Elastic deformation
ions
lithium
Plastic deformation
solid state
cycles
composite materials
geometry
Geometry

Keywords

  • Buckling
  • Diffusion-induced stress
  • Elastic-plastic deformation
  • Intercalation-deintercalation
  • Lithium electrodes
  • Three-dimensional electrode

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics

Cite this

Diffusion induced stresses in buckling battery electrodes. / Bhandakkar, Tanmay K.; Johnson, Harley T.

In: Journal of the Mechanics and Physics of Solids, Vol. 60, No. 6, 01.06.2012, p. 1103-1121.

Research output: Contribution to journalArticle

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