In those reports, both bidentate and monodentate coordination between Li + ions and [TFSI] - anions were observed in the first solvation shell of the Li + ion. The bidentate configuration represents the [TFSI] -anion that coordinates with the Li + ion with two oxygen atoms, and the monodentate configuration represents [TFSI] -anion that coordinate with the Li + ion with only a single oxygen atom. As shown in Figure , the first peak for C 1 is more intense than G 1 , implying that more strongly bonded Li + [TFSI] -complexes are found in the former. Further to our analysis of the Li + [TFSI] -complex, we calculated the RDFs between nitrogen (N 1 ) and oxygen (O 1 ) atoms of the [TFSI] -anion and the Li + ion (see , it can be seen that the interaction of the O 1 atom of the [TFSI] -anion to the atom Li + ion is greater than that for the N 1 atom of the [TFSI] -anion. Our results are in good agreement with previous reports by Lasse`gues et al .