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Characterization of SEI Layers on LiMn2O4 Cathodes with In situ Spectroscopic Ellipsometry.

DE2005837416

Publication Date	2005
Personal Author	Lei, J.; Li, L.; Kostecki, R.; Muller, R.; McLarnon, F.
Page Count	28
Abstract	In situ spectroscopic ellipsometry was employed to study the initial stage of SEI layer formation on thin-film LiMn(sub 2)O(sub 4) electrodes. It was found that the SEI layer formed immediately upon exposure of the electrode to EC/DMC (1:1 by vol) 1.0 M LiPF(sub 6) electrolyte. The SEI layer thickness then increased in proportion to a logarithmic function of elapsed time. In comparison, the SEI layer thickness on a cycled electrode increased in proportion to a linear function of the number of cycles.
Keywords	Cathodes Ellipsometry Electrodes Thickness Lithium
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Berkeley National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200520

Characterization of SEI Layers on LiMn2O4 Cathodes with In situ Spectroscopic Ellipsometry.

Characterization of SEI Layers on LiMn2O4 Cathodes with In situ Spectroscopic Ellipsometry.
DE2005837416

Publication Date	2005
Personal Author	Lei, J.; Li, L.; Kostecki, R.; Muller, R.; McLarnon, F.
Page Count	28
Abstract	In situ spectroscopic ellipsometry was employed to study the initial stage of SEI layer formation on thin-film LiMn(sub 2)O(sub 4) electrodes. It was found that the SEI layer formed immediately upon exposure of the electrode to EC/DMC (1:1 by vol) 1.0 M LiPF(sub 6) electrolyte. The SEI layer thickness then increased in proportion to a logarithmic function of elapsed time. In comparison, the SEI layer thickness on a cycled electrode increased in proportion to a linear function of the number of cycles.
Keywords	Cathodes Ellipsometry Electrodes Thickness Lithium
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Berkeley National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200520