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 › peer-review

58 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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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

In: Journal of Alloys and Compounds, Vol. 517, 15.03.2012, p. 20-25.

Research output: Contribution to journal › Article › peer-review

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title = "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",

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}",

note = "Funding Information: This research was supported by a grant from the Fundamental R&D Program for Technology of World Premier Materials funded by the Ministry of Knowledge Economy, Republic of Korea ( 10037921 ).",

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AU - Song, Jun Ho

AU - Byun, Dong Jin

AU - Kim, Young Jun

AU - Kim, Jeom Soo

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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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