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Simple, robust metal fluoride coating on layered Li123Ni0.13Co0.14Mn0.56O2 and its effects on enhanced electrochemical properties
- Authors
- Min, JW (Min, Ji Won); Gim, J (Gim, Jihyeon); Song, J (Song, Jinju); Ryu, WH (Ryu, Won-Hee); Lee, JW (Lee, Jong-Won); Kim, YI (Kim, Yong-Il); Kim, J (Kim, Jaekook); Bin Im, W (Bin Im, Won)
- Issue Date
- Jun-2013
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- ELECTROCHIMICA ACTA, v.100, pp 10 - 17
- Pages
- 8
- Journal Title
- ELECTROCHIMICA ACTA
- Volume
- 100
- Start Page
- 10
- End Page
- 17
- ISSN
- 0013-4686
1873-3859
- Abstract
- In present study, fluorine substituted Li1.23Ni0.13Co0.14Mn0.56O2-zFz (z=0-0.20) are synthesized by simple and low-temperature co-precipitation process and observed enhancement in their electrochemical properties are investigated as function of fluorine substitutions. F-19 MAS NMR analyses revealed the presence of fluorine as metal fluoride on the surface, and as oxy-fluoride in bulk Li(1.23)Ni(0.13)Co(0.14)Mn(0.56)O(2-z)Fz. Li1.23Ni0.13Co0.14Mn0.56O2-zFz (z=0.15) showed improved cycling performance and reduced cell impedance as a result of the fluorine doping. In addition, fluorine substitution controlled the amount of stabilizing transition metals in the lithium layers of spinel-like regions, which in turn resulted in countering the capacity loss and voltage decay compared to Li1.23Ni0.13Co0.14Mn0.56O2. (C) 2013 Elsevier Ltd. All rights reserved.
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