Synthesis and Ionic Conductivity of Polymer Electrolytes Based on a Polyphosphazene with Short Side Groups

摘要: Random copolymers of the polyphosphazene [NPR2]n have been synthesized via living ionic polymerization with mixed substituents at phosphorus atoms (i.e., R = bis(2-methoxy-ethyl)amino and n-propylamino). The polymers melt 190 °C start to decompose above 300 °C. Thin polymer electrolyte membranes were prepared by solution casting dissolved lithium triflate (LiSO3CF3) NaI. transparent showed favorable mechanical properties below 100 Tg values ranged between −50 −36 Membranes 10 wt % LiSO3CF3 (corresponding atomic ratio Li/(O + N) 1/30) rather low conductivities 3.2 × 10-7 S cm-1 30 1.9 10-5 as determined from impedance measurements. dispersion 4 Al2O3 nanoparticles in LiSO3CF3, however, leads an increase 2 orders magnitude, that is, 1.0 1.5 10-3 heterogeneously dope...