Abstract

Silicon film with pre-crack was used to study the coupling effect of stress and electrochemical field around the crack tip. The in-situ experiments were established to monitor the crack to realize the stress concentration around the crack and simultaneously prevent the crack initiation. The ex-situ Auger electron spectroscopy experiments shown the remarkably Li redistributed phenomenon around the crack tip. Furthermore, the fully coupled finite element method was used to reveal the fundamental mechanisms of the Li gathering effect and the stress relaxation phenomenon around the crack tip.

Original languageEnglish (US)
Pages (from-to)11-15
Number of pages5
JournalScripta Materialia
Volume167
DOIs
StatePublished - Jul 1 2019

Fingerprint

crack tips
Lithium
Crack tips
electric batteries
cracks
lithium
Cracks
Electrodes
electrodes
ions
stress concentration
crack initiation
stress relaxation
Stress relaxation
Silicon
Auger electron spectroscopy
silicon films
Crack initiation
stress distribution
Auger spectroscopy

Keywords

  • Crack tip
  • Electrochemistry
  • Lithium-ion batteries
  • Silicon
  • Stress-assisted diffusion

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Cite this

Lithium redistribution around the crack tip of lithium-ion battery electrodes. / Yang, Le; Chen, Hao Sen; Jiang, Hanqing; Song, Wei Li; Fang, Daining.

In: Scripta Materialia, Vol. 167, 01.07.2019, p. 11-15.

Research output: Contribution to journalArticle

Yang, Le ; Chen, Hao Sen ; Jiang, Hanqing ; Song, Wei Li ; Fang, Daining. / Lithium redistribution around the crack tip of lithium-ion battery electrodes. In: Scripta Materialia. 2019 ; Vol. 167. pp. 11-15.
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AB - Silicon film with pre-crack was used to study the coupling effect of stress and electrochemical field around the crack tip. The in-situ experiments were established to monitor the crack to realize the stress concentration around the crack and simultaneously prevent the crack initiation. The ex-situ Auger electron spectroscopy experiments shown the remarkably Li redistributed phenomenon around the crack tip. Furthermore, the fully coupled finite element method was used to reveal the fundamental mechanisms of the Li gathering effect and the stress relaxation phenomenon around the crack tip.

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