SOL-GEL PREPARATION OF ORGANIC-INORGANIC HYBRID POLYMER ELECTROLYTES AND THEIR ELECTROCHEMICAL CHARACTERIZATIONS

For the preparation of solid polymer electrolytes with high conductivi ty and good mechanical properties, organically modified ceramic electr olytes were prepared based on low molecular weight poly(ethylene glyco l), lithium salt and an inorganic matrix produced by sol-gel process o f tetraethoxysilane and a new poly(ethylene glycol)-modified sol-gel p recursor which was synthesized by the reaction of monomethoxy terminat ed poly(ethylene glycol) and 3-isocyanatopropyl triethoxysilane. Trans parent and self-supporting films were obtained showing high ionic cond uctivities (3.2 x 10(-6) similar to 1.4 x 10(-4) S/cm) at room tempera ture.