X-ray microtomography characterization of Sn particle evolution during lithiation/delithiation in lithium ion batteries

Joseph Gonzalez, Ke Sun, Meng Huang, Shen Dillon, Ioannis Chasiotis, John Lambros

Research output: Contribution to journalArticlepeer-review

Abstract

In this work, we investigate Tin (Sn) as a high capacity Li+ host material and perform an ex situ study with X-ray microtomography characterizing in three-dimensions (3D) Sn particle deformation during the crucial first cycles of lithiation/delithiation. We combine in-house algorithms with commercial software to develop 3D visualizations and measurements showing radial particle fracture, non-uniform lithiation of Sn particles, and a link between the global change in image intensity and loss of capacity. Particle size dependent "effective" volume expansion between 200% and 450% was measured during lithiation, and effective volume reductions of 50% were measured during delithiation. Relationships between the gray scale intensity change, volumetric expansion and particle size during the first cycle are also illustrated.

Original languageEnglish (US)
Pages (from-to)205-209
Number of pages5
JournalJournal of Power Sources
Volume285
DOIs
StatePublished - Jul 1 2015

Keywords

  • Lithium ion battery
  • Particle fracture
  • Tin
  • Volume expansion
  • X-ray microtomography

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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