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Received February 26, 2002
Accepted June 27, 2002
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Electrochemical Properties of the Oxysulfide LiAl0.18Mn1.82O3.97S0.03 Cathode Materials at Elevated Temperature
Department of Chemical Engineering, Hanyang University, Seoul 133-791, Korea 1School of Chemical Engineering and Technology, Chonbuk National University, Chonju 561-756, Korea
Korean Journal of Chemical Engineering, July 2002, 19(4), 718-721(4), 10.1007/BF02699323
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Abstract
A sulfur-doped spinel material, LiAl0.18Mn1.82O3.97S0.03, was synthesized by a sol-gel method using glycolic acid as chelating agent. The structural change of the oxysulfide spinel before and after cycling at elevated temperature was studied by charge/discharge measurements and X-ray diffraction. The capacity loss during cycling was noticeably increased in the cell operation temperature from 50 to 80 ℃. The capacity loss for the spinel material during cycling at elevated temperature is largely attributed to the formation of tetragonal Li2Mn2O4 and rock salt phase Li2MnO3.
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