Effect of aluminum fluoride coating on the electrochemical and thermal properties of 0.5Li 2MnO 3·0.5LiNi 0.5Co 0.2Mn 0.3O 2 composite material

Jin Hwa Kim; Min Sik Park; Jun Ho Song; Dong Jin Byun; Young Jun Kim; Jeom Soo Kim

doi:10.1016/j.jallcom.2011.11.117

Effect of aluminum fluoride coating on the electrochemical and thermal properties of 0.5Li ₂MnO ₃·0.5LiNi _0.5Co _0.2Mn _0.3O ₂ composite material

Jin Hwa Kim, Min Sik Park, Jun Ho Song, Dong Jin Byun, Young Jun Kim, Jeom Soo Kim

Department of Materials Science and Engineering

Research output: Contribution to journal › Article

56 Citations (Scopus)

Abstract

The positive effect of AlF ₃ (Al-F) coating on the over-lithiated transition metal oxide with a composition of 0.5Li ₂MnO ₃·0.5LiNi _0.5Co _0.2Mn _0.3O ₂ has been investigated to address its potential use in lithium ion batteries. On the basis of various structural and electrochemical characterizations, we elucidate a correlation between surface structure and its electrochemical performance. After the controlled coating with AlF ₃ (Al-F), we observed notable improvements on cyclic performance and rate capability as well as thermal stability. We found that uniformly introduced AlF ₃ (Al-F) not only preserves the electrochemical kinetics at the surface of the oxide but also stabilizes its surface as a protective layer against electrolyte oxidation during the high voltage charging. Such improvements will provide a further progress on the development of high-capacity cathode materials fulfilled with the stringent safety requirements.

Original language	English
Pages (from-to)	20-25
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	517
DOIs	https://doi.org/10.1016/j.jallcom.2011.11.117
Publication status	Published - 2012 Mar 15

Keywords

Aluminum fluoride
Cathode
Lithium ion battery
Oxide

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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Kim, J. H., Park, M. S., Song, J. H., Byun, D. J., Kim, Y. J., & Kim, J. S. (2012). Effect of aluminum fluoride coating on the electrochemical and thermal properties of 0.5Li ₂MnO ₃·0.5LiNi _0.5Co _0.2Mn _0.3O ₂ composite material. Journal of Alloys and Compounds, 517, 20-25. https://doi.org/10.1016/j.jallcom.2011.11.117

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abstract = "The positive effect of AlF 3 (Al-F) coating on the over-lithiated transition metal oxide with a composition of 0.5Li 2MnO 3·0.5LiNi 0.5Co 0.2Mn 0.3O 2 has been investigated to address its potential use in lithium ion batteries. On the basis of various structural and electrochemical characterizations, we elucidate a correlation between surface structure and its electrochemical performance. After the controlled coating with AlF 3 (Al-F), we observed notable improvements on cyclic performance and rate capability as well as thermal stability. We found that uniformly introduced AlF 3 (Al-F) not only preserves the electrochemical kinetics at the surface of the oxide but also stabilizes its surface as a protective layer against electrolyte oxidation during the high voltage charging. Such improvements will provide a further progress on the development of high-capacity cathode materials fulfilled with the stringent safety requirements.",

keywords = "Aluminum fluoride, Cathode, Lithium ion battery, Oxide",

author = "Kim, {Jin Hwa} and Park, {Min Sik} and Song, {Jun Ho} and Byun, {Dong Jin} and Kim, {Young Jun} and Kim, {Jeom Soo}",

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AU - Kim, Jin Hwa

AU - Park, Min Sik

AU - Song, Jun Ho

AU - Byun, Dong Jin

AU - Kim, Young Jun

AU - Kim, Jeom Soo

PY - 2012/3/15

Y1 - 2012/3/15

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AB - The positive effect of AlF 3 (Al-F) coating on the over-lithiated transition metal oxide with a composition of 0.5Li 2MnO 3·0.5LiNi 0.5Co 0.2Mn 0.3O 2 has been investigated to address its potential use in lithium ion batteries. On the basis of various structural and electrochemical characterizations, we elucidate a correlation between surface structure and its electrochemical performance. After the controlled coating with AlF 3 (Al-F), we observed notable improvements on cyclic performance and rate capability as well as thermal stability. We found that uniformly introduced AlF 3 (Al-F) not only preserves the electrochemical kinetics at the surface of the oxide but also stabilizes its surface as a protective layer against electrolyte oxidation during the high voltage charging. Such improvements will provide a further progress on the development of high-capacity cathode materials fulfilled with the stringent safety requirements.

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KW - Cathode

KW - Lithium ion battery

KW - Oxide

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