An electrolyte solution composed of cyclic ethylene carbonate (EC) and linear ethyl methyl carbonate (EMC) as solvents and lithum hexafluorophosphate (LiPF 6 ) as salt is simulated using molecular dynamics (MD). A number of compositions are prepared varying the number of LiPF 6 in a constant molar-mass ratio of 24 : 76 of EC and EMC. The salt concentration was varied from very low (0.21 M) to very high (2.44 M), details are given in supplementary information. To investigate the influence of solvent composition (EC:EMC ratio), the ratio is varied from 0 : 100 to 76 : 24 for a given salt concentration of 0.95 M. We employed two main force field models, (1) non-polarizable force field, and (2) polarizable force field, whose simulation details are discussed below.