“…Because plasticizers are low in molecular weight, nonvolatile substances (mostly liquids) that, when added to a polymer, improve its flexibility, processability, and, hence utility. Generally, low molecular weight, high dielectric constant polar organic solvents such as ethylene carbonate (EC) [11], propylene carbonate (PC) [12], polyethylene glycol (PEG) [13], dimethylformamide (DMF) [6], dimethylsulfoxide (DMSO) [14], dioctyl phthalate (DOP) [15] and dibutyl phthalate (DBP) [16] have been used in polymer electrolytes to enhance their room temperature ionic conductivities. The conductivities of these electrolytes critically depend on the physical properties of the plasticizer such as its viscosity and dielectric constant.…”