PEO-BASED POLYMER BLENDS AS MATERIALS FOR SOLID ELECTROLYTES

Two different methods leading to the preparation of highly conductive polymer solid electrolytes are described. The polymers were modified by the addition of ceramic powders or organic polymers used as crystallization retarders. In both cases the room-temperature ionic conductivities were greatly improved. The reported values of ionic conductivity are higher than 10-5 S/cm at ambient temperatures, which is at least two orders of magnitude higher than for pristine PEO-based systems. The addition of ceramic particles causes an increase in the mechanical and temperature stability of the studied polymer electrolytes. All of the investigated samples are highly amorphous and their structures are stable over time. © 1990.