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 | |
| Publication status | Published - 2012 Mar 15 |
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Keywords
- Aluminum fluoride
- Cathode
- Lithium ion battery
- Oxide
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials
- Materials Chemistry
- Metals and Alloys
Cite this
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
}
TY - JOUR
T1 - 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
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
N2 - 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.
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.
KW - Aluminum fluoride
KW - Cathode
KW - Lithium ion battery
KW - Oxide
UR - http://www.scopus.com/inward/record.url?scp=84856223888&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84856223888&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2011.11.117
DO - 10.1016/j.jallcom.2011.11.117
M3 - Article
VL - 517
SP - 20
EP - 25
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -