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Anisotropic Lithium ion Migration in LiFePO4
- Authors
- Park, S. B.; Park, C. K.; Hwang, J. T.; Cho, W. I.; Jang, H.
- Issue Date
- 12월-2011
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- LiFePO4; electron microscopy; electron diffraction; anisotropy; ion migration
- Citation
- METALS AND MATERIALS INTERNATIONAL, v.17, no.6, pp.1017 - 1020
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- METALS AND MATERIALS INTERNATIONAL
- Volume
- 17
- Number
- 6
- Start Page
- 1017
- End Page
- 1020
- ISSN
- 1598-9623
- Abstract
- An anisotropic behavior of lithium ion migration in LiFePO4 is investigated using the cathode particles after chemical delithiation. A phase contrast of a LiFePO4 particle validating the directional property is also found. It suggests that the lithium ion migration path is limited to the [010] direction and the phase boundary between LiFePO4 and FePO4 is perpendicular [010]. The symmetric phase boundary inside the LiFePO4 particle is contrary to the non-directional core-shell model reported by others. The molecular dynamics simulation confirms the crystallographic direction with the lowest energy for lithium ion migration.
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