Cation mobility and anion reorientation in lithium trifluoromethane sulfonate, LiCF3SO3

We present a detailed study of the dynamic processes present in the lithium ionic conductor lithium trifluoromethane sulfonate, LiCF3SO3. Using 7Li-, 17O- and 19F solid state NMR line shape analysis and T1-NMR, the anionic (CF3- and SO3-reorientation) and cationic dynamics (Li motion) could be studied separately. Whereas the CF3 and SO3 reorientations are active at ambient temperatures and not correlated to the cation motion, the NMR data indicate a strong correlation between the Li motion and the reorientation of the complete triflate anion.