3D Printable Ionogels with high ionic Conductivity based on Sulfonate-containing Ionic LiquidsWednesday (19.06.2019) 10:45 - 11:00
Ionic-liquid (IL) filled commercial stereolithography (SLA) resins were prepared by addition of sulfonate-based ILs, 1-methyl-3-(4-sulfobutyl)imidazolium para-toluenesulfonate [BmimSO3H][pTS], 1-methyl-1-butylpiperidiniumsulfonate para-toluenesulfonate [BpipSO3][pTS], andf 1-methyl-3-(4-sulfobutyl) imidazolium methylsulfonate [BmimSO3H][MeSO3] to a commercial epoxy resin. The article describes both the fundamental properties of the ILs and of the resulting ionogels (IGs). The IGs obtained from the ILs and the resin show high ionic conductivity of up to ca. 2*10-3 S/cm at room temperature. Moreover, the ionogels are stable to about 200 °C and mechanically robust. Finally, and most importantly, the article demonstrates that the material can be molded in 3D using stereolithography. This provides access to IGs with complex 3D shapes with potential application in battery or fuel cell technology.