Physical Properties of Lithium Co-polyelectrolyte Based on Imidazolium and Ammonium-type Ionic Liquids

Abstract

Lithium co-polyelectrolyte-ionic liquid systems, using poly (lithium 2-acrylamido-2-methyl propanesulfonate; PAMPSLi) and polyvinyl formamid (PVF) were prepared and their electrochemical and physical properties were measured. The conductivity of co-polymer systems,PAMPSLi/PVF/N, N-dimethyl-N-propyl-N-butylammonium tricyanomethanide (PAMPSLi/PVF/N1134TCM) and PAMPSLi/PVF/N, N-dimethyl-N-propyl-N-butylammonium dicyanamide (PAMPSLi/PVF/N1134DCA) exhibited low viscosity (N1134TCM:N1134DCA 28.6cP, 28.7cP) and higher conductivity (2.48 × 10−3 Scm−1, 2.2 × 10−3 Scm−1) than homopolymer system. The ionic conductivity PAMPSLi/PVF/1-ethyl-3-methyl imidazolium dicyanamide (PAMPSLi/PVF/emImDCA)exhibited 1.54 × 10−3 Scm−1 and low viscosity (emImDCA: 28.09cP). High flexibility of imidazolium cation and dissociation of lithium cation from the co-polymer chains were affected by high conductivity and low viscosity.