POROUS POLYMER ELECTROLYTE CONTAINING VINYLIDENEFLUORIDE BASED POLYMER AND ACRYLATE BASED POLYMER AND PROCESS FOR PRODUCING SAME

摘要

PURPOSE: A porous polymer electrolyte obtained by mixing a vinylidenefluoride based polymer with an acrylate based polymer having excellent compatibility with an organic solvent, directly forming a porous structure on a polymer matrix and impregnating a liquid electrolyte and process for producing the same are provided which have excellent impregnating characteristics and ionic conductivity and improved surface stability. CONSTITUTION: This porous polymer electrolyte is prepared by a process consisting of: obtaining a polymer film by dissolving a polymer blend mixed a vinylidenefluoride based polymer with an acrylate based polymer, a plasticizer and inorganic matter in a cosolvent, casting on a glass plate and evaporating the cosolvent; obtaining a porous polymer film by impregnating the obtained polymer film with a polar solvent and drying; and impregnating the dried polymer film with a liquid electrolyte by dissolving a lithium salt in an organic solvent.