Anisotropic Lithium ion Migration in LiFePO_4

• Published in: Metals and materials international pp. 1017 - 1020
• Main Authors: S. B. Park, C. K. Park, J. T. Hwang, W. I. Cho, 장호
• Format: Journal Article
• Language: English
• Published: 대한금속·재료학회 01.12.2011
• Subjects: 재료공학
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-011-6021-9

An anisotropic behavior of lithium ion migration in LiFePO_4 is investigated using the cathode particles after chemical delithiation. A phase contrast of a LiFePO_4 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 LiFePO_4 and FePO_4 is perpendicular [010]. The symmetric phase boundary inside the LiFePO_4 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. KCI Citation Count: 1