In the non-polarizable OPLS-AA force field formalism, the total energy for each ionic liquid system are evaluated as a sum of individual energies for the harmonic bond stretching and angle bending terms, a cosine series for torsional energetics, and Coulomb and 12-6 Lennard-Jones terms for the nonbonded interactions. Geometric combining rules for the Lennard-Jones coefficients were utilized. Nonbonded interactions were evaluated intermolecularly and for intramolecular atom pairs separated by three or more bonds. To apply the same parameters for both intra-and intermolecular interactions, the 1,4-intramolecular interactions were reduced by a factor of 2. A 12-6 Lennard-Jones (LJ) pair interaction model with 13.5 Å cut-off was used to model the van der Waal's interactions. The bonded and non-bonded parameters for EC and DMC were obtained from the OPLS-AA force fields , while those for [EMI] + and [TFSI] --were taken from Lopes et al. and Li + from Jensen et al. Charges are downscaled to an absolute value of 0.8 to account for the charge transfer and polarizability within ILs.