Phase transformation of LixNi1-yCoyO2 along with lithium deintercalation

Mee Kyung Song, Seung Do Hong, Kyoung Tai No

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A systematic investigation of the structural change of LixNi1-yCoyO2, a possible cathode material in lithium ion secondary battery, has been performed during lithium deintercalation. Three representative models, LiNiO2, LiCoO2 and LiNi0.8Co0.2O2, are constructed initially and then the molecular simulations according to the lithium content are performed using the modified universal force field. The phase transformations from rhombohedral to monoclinic and finally to rhombohedral have occurred for all three models by successively decreasing the lithium content. The ranges of lithium content where the phase transformation occurred agree well with the experimental results. This simple force field-based calculations are successfully applied to the structural changes including phase transformation of LixNi1-yCoyO2 system.

Original languageEnglish
Pages (from-to)1249-1252
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume69
Issue number5-6
DOIs
Publication statusPublished - 2008 May 1

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Lithium
phase transformations
lithium
Phase transitions
field theory (physics)
storage batteries
Secondary batteries
Cathodes
cathodes
Ions
ions
simulation

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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abstract = "A systematic investigation of the structural change of LixNi1-yCoyO2, a possible cathode material in lithium ion secondary battery, has been performed during lithium deintercalation. Three representative models, LiNiO2, LiCoO2 and LiNi0.8Co0.2O2, are constructed initially and then the molecular simulations according to the lithium content are performed using the modified universal force field. The phase transformations from rhombohedral to monoclinic and finally to rhombohedral have occurred for all three models by successively decreasing the lithium content. The ranges of lithium content where the phase transformation occurred agree well with the experimental results. This simple force field-based calculations are successfully applied to the structural changes including phase transformation of LixNi1-yCoyO2 system.",
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Phase transformation of LixNi1-yCoyO2 along with lithium deintercalation. / Song, Mee Kyung; Hong, Seung Do; No, Kyoung Tai.

In: Journal of Physics and Chemistry of Solids, Vol. 69, No. 5-6, 01.05.2008, p. 1249-1252.

Research output: Contribution to journalArticle

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