Synthesis and Characterization of Poly (ethylene glycol) Methacrylate with Sulfobetaine Pendants and Its Application as the Polymer Electrolyte
The parent polymer, is used to prepare electrolytes: polymer (PMBS-8) /LiPF6 and PMBS-8/LiPF6 / Ionic liquid (PYR11TFSI) as plasticizer. The resulting electrolyte polymers show mechanical properties akin to elastic solids. The glass transition temperature is closed at 14 °C for all specimens, and PMBS-8 is thermally stable up to 195 °C which is important since thermally stable polymers along a wide temperature range are sought for this kind of application. The conductivity of these materials which was dried carefully, varies with temperature, following an Arrhenius-like relationship. The maximum conductivity has been found to be 4.3×10−4 S cm−1 at room temperature for electrolyte (PMBS-8/LiPF6/PYR11TFSI).