CHARACTERISTICS OF A POLY(ETHYLENE OXIDE) LIBF4 POLYMER ELECTROLYTE

the poly(ethylene oxide)-lithium tetrafluoborate complex, (PEO)//7LiBF//4, has been characterized in terms of total and electronic conductivity, lithium transport number, stability versus lithium electrode and thermal properties. The results indicate that this polymeric electrolyte offers promises of application in lithium-based electrochemical devices. The lithium transport number t//L//i** plus was evaluated using the method proposed by P. G. Bruce and C. A. Vincent. The method is based on a combination of ac and dc polarizations on a symmetrical cell using two lithium electrodes.