Ionic liquid incorporated metal-organic framework as high conductivity solid conductor

As a new type of composite ionic conductor, the combination of ionic liquids (ILs) and metal organic framework (MOF) shows a good application prospect. In this study, two ionic liquids, 1,3-dimethylimidazolium tetrafluoroborate ([Dmim][BF4]) and 1-Allyl-3-methylimidazolium dicyanamide ([Amim][N(CN)2]) were successfully combined with MIL-101(Cr). The influence of the amount of ionic liquid and temperature on the electrical conductivity of composite IL@MIL-101(Cr) was explored. The optimal electrical conductivity reached 3.73 x 10-3S center dot cm-1 ([Dmim][BF4]) and 2.69 x 10-3S center dot cm-1 ([Amim][N(CN)2]) respectively when exposed to air at 100 degrees C. It is worth noting that the ionic conductiv-ity of all composites exhibits linear Arrhenius behavior. Since the activation energies of composites are closely related to the type of ionic liquid and MOF types, these two composites exhibit different activa-tion energies. The reason for the difference in activation energies is analyzed with the aid of quantum chemical calculations. (c) 2023 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

Automated summary

As a new type of composite ionic conductor, the combination of ionic liquids (ILs) and metal organic frameworks (MOFs) was successfully explored in this study. The optimal electrical conductivity of the composite IL@MIL-101(Cr) reached 3.73 x 10-3S center dot cm-1 for [Dmim][BF4] and 2.69 x 10-3S center dot cm-1 for [Amim][N(CN)2] when exposed to air at 100 degrees C. The difference in activation energies between the composites was analyzed using quantum chemical calculations.