Ionic liquids, consisting of molecular cations and anions, are regarded as the third most important liquid following water and organic solvents. Due to their high electrical conductivity, they have especially gained attention in relation to electrochemical applications such as fuel cells or solar cells. In Application Byte B-XRD 1026, it was shown that the crystallization behavior of mixed solutions of ionic liquids at low temperatures differs depending on the water content. In this Application Byte, a system featuring simultaneous XRD and DSC measurements was used to cool ionic liquids with less than 1 mol% water content to below -70°C to evaluate the grain size of the acquired crystals.
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