Supercritical CO2 modified organic ionic plastic crystals

The treatment of an organic ionic plastic crystal electrolyte <i>N</i>-methyl-<i>N</i>-ethylpyrrolidinium tetrafluoroborate (P_1,2BF₄) with supercritical CO₂ resulted in a substantial increase in ionic conductivity, especially in the more highly ordered solid phases of the material, and also stabilised the most ordered phase to lower temperatures. <br>