Static and dynamic properties of ionic liquids

Author: Koishi T.   Fujikawa S.  

Publisher: Taylor & Francis Ltd

ISSN: 0892-7022

Source: Molecular Simulation, Vol.36, Iss.15, 2010-12, pp. : 1237-1242

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Abstract

We performed molecular dynamics (MD) simulations of ionic liquids composed of 1-butyl-3-methylimidazolium ([bmim]) cation with PF6, NO3 and Cl anions to determine their static and dynamic properties. Large-scale simulation of 4096 ion pairs (131,072 particles in [bmim]PF6) was performed to estimate the system-size dependence of the static and dynamic properties. The diffusion constant, which is 100 times smaller than that of a normal liquid such as water, was estimated from long-time simulations. We also performed non-equilibrium MD simulations to determine the electrical conductivity. We obtained a nonlinear relationship between the electrical current and external electric field strength.