Polymer electrolyte system based on (PEO plus KBrO3) - its application as an electrochemical cell

Ion-conducting polymer electrolyte films based on poly (ethylene oxide) (PE O) complexed with potassium bromate (KBrO3) are prepared by a solution-cast technique. Several experimental techniques such as differential scanning c alorimetry (DSC), de-conductivity and transference number measurements are employed to characterise this polymer electrolyte system. The conductivity- temperature plots show two regions in the temperature range of study and tr ansport number data which indicate that the charge transport in this electr olyte system is predominantly due to ions. Using these polymer electrolyte films, solid-state electrochemical cells are fabricated and their discharge characteristics are examined for a constant load of 100 k Omega. Several c ell parameters associated with the cells are evaluated and reported. (C) 20 01 Elsevier Science B.V. All rights reserved.