A complex ionic conductor was prepared by solution complexation of lithium methoxy oligo (oxyethylene) sulfonate (SOL8
where & is the repeating unit of oxyethylene) with comblike copolyether poly [methoxy oligo (oxyethylene)methacrylate-co-acrylamide] [P(MEO16-AM)]. The composition dependences of glass transition temperature
crystallinity as well as conducti-vity of the complex were investigated. DC polarization showed that the complex shows a stable polarization characteristic. Polarization reversing method confirmed that the complex has a cati-onic transference number of 0.99.