Self-Diffusion Self-diffusion coefficients obtained via the Einstein formalism from the cubic MD simulation boxes D PBC and systemsize independent self-diffusion coefficients D 0 determined from the OrthoBoXY simulations are depicted in Figure for selected temperatures. A comprehensive list of all computed self-diffusion coefficients is included in Tables and in the SI. The calculated self-diffusion coefficients at 303 K are in good agreement with the experimental data of Zhang and co-workers, as shown in Figure in the SI. As expected, the system-size independent self-diffusion coefficients D 0 are systematically larger than the system size-dependent diffusion coefficients D PBC . With increasing G3 content, the self-diffusion coefficients of all components increase by several orders of magnitude. By adding G3 to the salt, direct cation-anion contacts are reduced, while ions are also getting more separated from each other, reducing the Coulomb interaction. Both lead to a higher mobility of all components.