Lithium ion conducting polymers containing trifluoromethylsulfonamide anions andoligoether side chains bound to a polysiloxane backbone exhibit a room-temperature Li+conductivity of 1.2 × 10-6 S cm-1 and a Tg of −67 °C. Apparently, the flexible comb polymerarchitecture results in a high concentration of charge carriers and good ionic conductivity.