Poly（lithium propionate methyl siloxane ）as a single-ion carrier source was synthesized. The crosslinked film showed lower lithium ionic conductivity at room temperature (about 10-10 S/cm). However,the lithium ionic conductivity was obviously increased by blending with high polar polymers such as polyethylene oxide, poly （methylsiloxane - co- ethylene oxide） and poly （methylsiloxane- g- ethylene oxide）. In the blend system a high conductivity of 10-7-10-5 Scm-1 at room temperature was obtained and the single-ion conductivity was deeply influenced by the content of the poly （lithium propionate methyl siioxane）. The dc ionic conductivity of the flexible crosslinked films is more stable over time.
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