Abstract
The local structure of the solvated lithium cation in ethylene carbonate (EC) solutions has been investigated using Raman spectroscopy. The relative intensity change of the split Raman line at ∼ 900 cm −1 in LiClO 4/EC was treated quantitatively. This splitting originates from the coexistence of two type EC molecules; one solvates to Li cation and the other does not solvate to Li cation. The resultant intensity data have been applied to the analysis of the Li +-EC solution. The possibilities of the determination of the degree of dissociation of LiClO 4 and that of the solvation number of Li + in a contact ion pair were also discussed. It was found that this Raman line is useful for analysing the solution structure in Li +-EC systems. Basic intensity parameters for such analyses can be determined.
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