Blended lithium ion conducting polymer electrolytes based on boroxine polymers

A new series of blended polymer electrolytes based on a boroxine polymer (B P) with poly(ethylene oxide) (PEO), an ethylene oxide-propylene oxide copol ymer or poly(methyl methacrylate) were prepared. Good room temperature mech anical properties were exhibited by electrolytes containing in excess of 30 % PEG. Cationic transference number measurements indicated that a slight im provement in lithium ion conductivity could be achieved by using a mixture of LiCF3SO3 and LiN(CF3SO2)(2) as the electrolyte salt. Electrolytes incorp orating significant proportions of BP exhibited reduced lithium-polymer ele ctrolyte interfacial resistance. (C) 2001 Elsevier Science B.V. All rights reserved.