Blended lithium ion conducting polymer electrolytes based on boroxine polymers

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