Solid State Ionics, Vol.177, No.9-10, 843-846, 2006
Study on ionic conductivity of polymer electrolyte plasticized with PEG-aluminate ester for rechargeable lithium ion battery
We have synthesized poly(ethylene glycol) (PEG)-aluminate ester as a plasticizer for solid polymer electrolytes. The thermal stability, ionic conductivity and electrochemical stability of the polymer electrolyte which consist of poly(ethylene oxide) (PEO)-based copolymer, PEG-aluminate ester and lithium bis-trifluoromethanesulfonimide (LiTFSI) were investigated. Addition of PEG-aluminate ester increased the ionic conductivity of the polymer electrolyte, showing greater than 10(-4)Scm(-1) at 30 degrees. The polymer electrolyte containing PEG-aluminate ester retained thermal stability of the non-additive polymer electrolyte and exhibited electrochemical stability up to 4.5V vs. Li+/Li at 30 degrees C. (c) 2006 Elsevier B.V All rights reserved.