3.

(a) Arrhenius plots of charge transfer resistance (R ct) for the graphite electrode in 3.0 M LiFSA solutions containing ethylene sulfite (ES; x ES = 0.1), measured at a potential of 0.1 V vs Li/Li+. Solvents used: TFEAc (diamonds), THF (triangles), AN (inverted triangles), PC (circles), and DMF (squares). (b) Correlation between the activation energy (E a) for the Li+ insertion reaction and the calculated Li+-solvent binding energy (ΔE bind).