Highly Conductive Nonstoichiometric Protic Poly(ionic liquid) Electrolytes

摘要: Nonstoichiometric protic ionic liquids have recently gained interest because proton acceptors are crucial in the electrolyte of many electrochemical applications such as fuel cells, batteries and supercapacitors. In present work we prepared studied several poly(ionic liquid)s doped with acid nonstoichiometric amounts. The were based on polydimethylsiloxane backbones functionalized imidazole, 1,2,4-triazole benzimidazole groups, respectively, via flexible alkyl spacer units. These polymers did not show any observable glass transition above -50 °C, resulting high charge mobility conductivities up to 19 µS/cm at 25 °C. Additional doping free imidazole significantly increased conductivity, 0.15 mS/cm more than four orders magnitude higher nondoped state. origins fast transport these polymer electrolytes investigated by impedance spectroscopy electrode polarization analysis. results indicate that kinds potential high-performance for room temperature organic batteries, where availability both donors is important. (Less)