Structure-conductivity relationsihp in polymer electrolytes formed by network polymers from poly[dimethylsiloxane-g- poly(ethylene oxide)] and litegum perchlorate

The combination of LiClO₄ and network polymers from polydimethyl-siloxane-g-poly(ethylene oxide)] has been applied to polymer electrolytes as an Li⁺ ion conductor, and the structure/conductivity relationship has been investigated. The ionic conductivity is about 10⁻⁶ S cm⁻¹ at room temperature. The polymer electrolytes form a micro-heterogeneous structure from the constituent segments, and the incorporated LiClO₄ preferentially interacts with the poly(ethylene oxide) segments. The segmental motion of poly(ethylene oxide) appears to contribute to the ionic migration, while that of poly(dimethylsiloxane) does not. Not all of the incorporated LiClO₄ functions as carrier ions.