High temperature performance of surface-treated Li1.1(Ni 0.15Co0.1Mn0.55) O1.95 layered oxide

H. Deng, I. Belharouak, C. S. Yoon, Y. K. Sun, K. Amine

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

The electrochemical performance of pristine and AlF3 -coated Li1.1(Ni0.15Co0.1Mn0.55) O 1.95 cathodes is reported for cells cycled at 25 and 55°C. In a half-cell configuration, a nanolayer coating of AlF3 on the Li 1.1(Ni0.15Co0.1Mn0.55) O 1.95 stabilizes the capacity on cycling. However, in cell tests with metallic lithium anodes, the initial coulombic efficiency decreased slightly at both 25 and 55°C for AlF3 -coated Li1.1(Ni 0.15Co0.1Mn0.55) O1.95 in comparison to the pristine material. For cells constructed with graphite instead of lithium anodes, the capacity stability improved with cycling for the coated cathode materials. Transition-metal dissolution was more pronounced for the AlF3 -coated sample when stored at 55°C in electrolytes. For both the pristine and AlF3 -coated samples, there was no extra capacity loss due to the elevated temperature. Around 10% capacity gain of the cathode materials at elevated temperature is assumed to be due to improved thermodynamic activation.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume157
Issue number10
DOIs
Publication statusPublished - 7 Sep 2010
Externally publishedYes

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Oxides
Cathodes
Lithium
oxides
cathodes
Anodes
cells
anodes
Graphite
lithium
Temperature
Electrolytes
cycles
Transition metals
Dissolution
Chemical activation
Thermodynamics
Coatings
dissolving
graphite

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

High temperature performance of surface-treated Li1.1(Ni 0.15Co0.1Mn0.55) O1.95 layered oxide. / Deng, H.; Belharouak, I.; Yoon, C. S.; Sun, Y. K.; Amine, K.

In: Journal of the Electrochemical Society, Vol. 157, No. 10, 07.09.2010.

Research output: Contribution to journalArticle

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