An electrochemical study of PEO:LiBF4−glass composite electrolytes (original) (raw)

Several solid electrolytes derived from poly(ethylene oxide) doped with lithium tetrafluoroborate and a high conductivity lithium borosulfate glass were formulated and investigated for their electrochemical performance. The electrochemical characterization included a.c. impedance measurements, the temperature dependence of conductivity, scanning electron microscopy (SEM), cyclic voltammetty (CV), and the charge/discharge cycling of symmetric cells. The ionic eonductivities of these electrolytes at ambient temperature were around lo-' S cm-'. Although no significant improvement in conductivity was observed, the cyclic voltammetry, impedance spectroscopy, and cycling data on Liipolymer/Li and Li/polymer/ Ni cells reveal that the electrode reactions are facilitated by the glass incorporation.