Low Glass Transition Temperature Polymer Electrolyte Prepared From Ionic Liquid Grafted Polyethylene Oxide

摘要

In this contribution, we report a new type of poly (ionic liquids) prepared by imidazolium ionic liquids directly grafting onto polyethylene oxide backbone. Different molecular weights of poly (ionic liquids) are obtained with a low glass transition temperature up to 214 ℃. The materials as polymer electrolyte achieve a high conductivity around 10~(-5) S cm~(-1) at 30 ℃ and close to 10~(-3) S cm~(-1) at 90 ℃. High viscosity up to 4000 Pa s at room temperature would minimize the electrolytes leaking in electrochemical devices.