Ion conducting composites from Li2S-SiS2-Li4SiO4 oxysulfide glass and poly(oxyethylene)s

Novel inorganic/organic composites were constructed from highly conductive Li2S-SiS2-Li4SiO4 oxysulfide glass and Linear poly(oxyethylene)s (POEs) or high molecular weight branched POE without adding any Lithium salts. The io nic conductivity of composites was lower than that of the oxysulfide glass, but the mixing of glass powder into the POEs allowed the preparation of th in films. The composites prepared from low molecular weight linear oligomer ic POEs (M-n = 600 and 1000) showed higher ionic conductivities than those from the high molecular weight POEs (M-n = 4000 and 10000). Interestingly, the composite from the high molecular weight branched POE (M-n = 1.3 X 10(5 )) showed ionic conductivity comparable with those from linear oligomeric P OEs and afforded a flexible film form. (C) 2001 Elsevier Science Ltd. All r ights reserved.