Piperazinium Poly(Ionic Liquid)s as Solid Electrolytes for Lithium Batteries.

Poly(ionic liquid)s combine the unique properties of ionic liquids (ILs) within ionic polymers holding significant promise for energy storage applications. We report here the synthesis and characterization of a new family of poly(ionic liquid)s synthesized from cationic piperazinium ionic liquid monomers. The cationic poly(acrylamide piperazinium) in combination with sulfonamide anions like TFSI and FSI were characterized as solid polymer electrolytes. The polymer electrolytes in combination with pyrrolidonium ionic liquids and LiFSI showed high ionic conductivity, 5×10 -3 S cm -1 at 100 °C. Piperazinium polymer electrolytes showed excellent compatibility with lithium metal reversible plating and stripping at high current density and low temperature 40 °C. This article is protected by copyright. All rights reserved.