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 language | English (US) |
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Pages (from-to) | 205-209 |
Number of pages | 5 |
Journal | Journal of Power Sources |
Volume | 285 |
DOIs | |
State | Published - 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