Simsek, Ö.; Wan, M.; Zimmer, P.; Moises, I. A.; Muench, S.; Gohy, J.-F.; Bresser, D.; Schubert, U. S.: UV-polymerized composite ionogels for Li-organic batteries. Electrochimica Acta 543 (2025), p. 147540/1-7
10.1016/j.electacta.2025.147540
Open Accesn Version
Abstract:
In this work, we report novel ionogels produced via UV-induced free radical polymerization for lithium-organic cells. Before UV-polymerization for 75 min, the methacrylate- and methacrylamide-based monomers were mixed with a lithium salt-ionic liquid mixture and a photo-initiator. The thermal and electrochemical properties of these highly ionically conductive ionogels (0.9 mS cm-1 at 20 degrees C) were improved with the incorporation of Al2O3 particles. These composite ionogels show a significantly higher ionic conductivity (1.7 mS cm-1 at 20 degrees C) and much lower overpotential in addition to a thinner and more even SEI. Moreover, they increased the cycling performance when utilized as electrolyte and separator in Li//PTMA cells.