Lithium-Conducting Nafion Membrane Plasticized with a DMSO–Sulfolane Mixture
R. R. Kayumov, Alena P. Radaeva, A. A. Krupina, Ksenya A. Tarusina, A. N. Lapshin, L. V. Shmygleva
Abstract
Abstract The effect of the composition of a binary plasticizing mixture based on dimethyl sulfoxide and sulfolane on the physicochemical properties of the lithium form of the Nafion membrane is studied. To explain the behavior of the electrotransport properties of membranes, experimental studies of intermolecular interactions, thermal behavior, and the ion-transport properties of the obtained lithium-conducting polyelectrolytes are carried out using IR spectroscopy, simultaneous thermal analysis, and impedance spectroscopy. A relationship is found between the shift of the eutectic point to the region of a lower content of sulfolane compared to bulk solvents and the composition of the plasticizer, in which the samples had the best conductivity of 0.76 mS/cm at 30°C.