New polymer electrolytes composed of acrylonitrile-methyl methacrylate-styrene (AMS) terpolymer, 1 M LiClO4-EC/PC, and an inorganic filler have been prepared. Depending on the composition of the components, these electrolytes exhibit a wide range of mechanical and electrical properties. The ionic conductivity reaches 1.4 x 10(-3) S/cm in a polymer electrolyte containing 27% AMS terpolymer, 64% LiClO4-EC/PC, and 9% silanized fumed silica at room temperature to give homogeneous films which exhibit good mechanical properties. These systems showed good compatibility with lithium electrodes and a sufficient electrochemical stability to allow safe operation in the rechargeable lithium batteries. The capacity and cycling performance of a Li/polymer electrolyte/Li1.03Mn2O4 solid-state cell employing AMS-based polymer electrolyte were investigated.