Single-ion conducting polymer electrolytes which contain fluoroalkane dicarboxylate substituted aluminate or borate backbone and two methoxy [oligo (ethyleneoxide)] side chains directly bonded to the ate complex centers (aluminum, borate, etc.) were prepared. Borate polymers containing a long ether chain (n=11.8) exhibited high ionic conductivity (10(-5) S cm(-1) at 30degreesC) and high electrochemical stability. The relationship between polymer structure and ionic conductivity is discussed with the partial charge density on oxygen atoms of the ate complex from the calculations in MOPAC. (C) 2004 The Electrochemical Society.