In this study, we synthesized a molecular hybrid conductor electrolyte using PWA ([H3PW12O40-nH(2)O]) and [1-butyl-3-methylimidazole][bis(fluoromethanesulfonyl) amide] ([BMIM][TFSI]) ionic liquid. The [BMIM][TFSI] ionic liquid can interact with the strongly acidic PWA. The hybrids were hydrophilic, and included some water molecules in the structure of the hybrids. The water molecules remained up to 80 degrees C, contributing to improve conductivity under an anhydrous N-2 atmosphere. The conductivity of PWA-[BMIM] [TFSI] hybrid under anhydrous conditions increased from 10(-4) S/cm to 0.04 S/cm at 60 degrees C. The conductivity of the hybrids at each temperature was higher than that of pure PWA and [BMIM][TFSI] under anhydrous condition. It can be due to the protonic carriers. (C) 2007 Elsevier Ltd. All rights reserved.