SYNTHESIS AND STUDY OF NEW COMPOSITE SOLID ELECTROLYTES BASED ON POLYETHYLENE OXIDE, ALUMINUM-OXIDES AND CROWN-ETHER

A number of new polymeric solid electrolytes (PSE) based on LiClO4 and poly(ethylene oxide) (PEG) with added amounts of finely divided powde rs of beta-LiAlO2, gamma-LiAlO2, Al2O3 and 2,4-dioxo-16-crown-5 have b een synthesized and studied. The application of impedance spectroscopy has shown that the samples under study exhibit increased conductivity , of the order of 10(-4) to 10(-5) S/cm at room temperature, and good compatibility with cathodes based on thermally structured polyacryloni trile (TSPAN) and a lithium anode. It has been found that introduction of 2,4-dioxo- 16-crown-5 into a PEG-based PSE improves the parameters of the electrolyte due to the formation of crown-ether-lithium comple xes.