Polymer Electrolytes Based on Acrylonitrile‐Methyl Methacrylate‐Styrene Terpolymers for Rechargeable Lithium‐Polymer Batteries

New polymer electrolytes composed of acrylonitrile‐methyl methacrylate‐styrene (AMS) terpolymer, 1 M LiClO 4 ‐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 × 10 − 3 S / cm in a polymer electrolyte containing 27% AMS terpolymer, 64% LiClO 4 ‐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/ Li 1.03 Mn 2 O 4 solid‐state cell employing AMS‐based polymer electrolyte were investigated.