Spectroscopic studies on interactions and microstructures in propylene carbonate - LiTFSI electrolytes

Interactions between propylene carbonate (PC) and lithium bis(trifluoromethane sulfone imide) [LiTFSI, LiN(CF3SO2)(2)] were studied by Fourier transform (FT) Raman and IR spectroscopy. It was found that PC interacts with the Li+ ions and the TFSI- anions through its skeletal oxygen atoms, leading to solvent-separated ion pairs and contact ion pairs in the solution by way of the nitrogen atoms on the anion. Copyright (C) 2001 John Wiley & Sons, Ltd.