Improvement of structural and electrochemical properties of AlF3-coated Li[Ni1/3Co1/3Mn1/3]O2 cathode materials on high voltage region

B. C. Park, H. B. Kim, S. T. Myung, K. Amine, I. Belharouak, S. M. Lee, Y. K. Sun

Research output: Contribution to journalArticle

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Abstract

The particle surface of Li[Ni1/3Co1/3Mn1/3]O2 was modified by AlF3 as a new coating material to improve the electrochemical properties in the high cutoff voltage of 4.5 V. The AlF3-coated Li[Ni1/3Co1/3Mn1/3]O2 showed no difference in the bulk structure compared with the pristine one and the uniform AlF3 coating layers whose thickness is of about 10 nm covered Li[Ni1/3Co1/3Mn1/3]O2 particles, as confirmed by a transmission electron microscopy. The AlF3 coating on Li[Ni1/3Co1/3Mn1/3]O2 particles improved the overall electrochemical properties such as the cyclability, rate capability and thermal stability compared with those of the pristine Li[Ni1/3Co1/3Mn1/3]O2. Such enhancements were attributed to the presence of the stable AlF3 layer which acts as the interfacial stabilizer on the surface of Li[Ni1/3Co1/3Mn1/3]O2.

Original languageEnglish
Pages (from-to)826-831
Number of pages6
JournalJournal of Power Sources
Volume178
Issue number2
DOIs
Publication statusPublished - 1 Apr 2008
Externally publishedYes

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Keywords

  • AlF
  • Battery
  • Cathode
  • Coating
  • High voltage
  • Lithium

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry
  • Energy (miscellaneous)

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