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Received October 29, 2005
Accepted February 7, 2006
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Preparation and electrochemical properties of Li1.1Mn2O3.9F0.1 material for lithium secondary battery
Faculty of Applied Chemical Engineering, Center for Functional Nano Fine Chemicals (BK21 Program), Chonnam National University, 300 Yongbong-dong, Gwangju 500-757, Korea 1Department of Applied Chemistry, Saga University, 1 Honjo, Saga 840-8502, Japan
Korean Journal of Chemical Engineering, July 2006, 23(4), 566-569(4), 10.1007/BF02706795
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Abstract
Li1.1Mn2O4 and Li1.1Mn2O3.9F0.1 materials have been synthesized at 900 °C by using the melt-impregnation method. Li1.1Mn2O4 showed fairly large capacity fading at room temperature; however, Li1.1Mn2O3.9F0.1 exhibited excellent cycling performance for 85 cycles at room temperature. Doped fluorine ions increased the oxygen amount in Li1.1Mn2O3.9F0.1, which resulted in an increase of the average Mn oxidation state. We found that this indication was the_x000D_
main reason for the cycling performance improvement of Li1.1Mn2O3.9F0.1 compound.
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