These different coordination mechanisms lead to two distinct polarizations of TFSI. In oxygen-coordinating clusters (Li-N distance above 2.5 Å), the nitrogen and oxygen charges are close to equal, while in the nitrogen-coordinating clusters (Li-N distance below 2.5 Å), the lithium pulls negative charge towards the nitrogen, causing the nitrogen partial charge to become more negative as seen in Figure . The oxygen to nitrogen charge ratios are 0.