Preparation and properties of PEO complexes of divalent cation salts

Complexes of poly(ethylene oxide) (PEO) with MgCl2 and PbBr2 have been prepared by a two-solvent technique. The resulting materials are stable to above 250°C, and generally have fairly high ionic conductivities. The conductivity of MgCl2. (PEO)16 is comparable to that of LiCF3SO3. (PEO)9 from 80° to 150°C. Preliminary transport number measurements on PbBr2. (PEO)20 indicate a transport number for Pb2+ of about 0.6 at 140°C.