Electrical and solid-state battery performance of a new PVC/PEO plus KBr blend-based polymer electrolyte system

Solid polymer blend electrolyte based on polyvinyl chloride (PVC) and polyethylene oxide (PEO) complexed with potassium bromide (KBr) for different weight percent ratios were prepared using solution cast technique. Various experimental techniques such as X-ray diffraction (XRD), AC conductivity, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and transference number measurements were employed to characterize these polymer blend electrolyte system. The conductivity analysis shows that the 15 wt% of potassium bromide-doped polymer blend electrolyte exhibits high ionic conductivity, and it has been found to 2.56 x 10(-5) S cm(-1) at room temperature. The temperature dependence of ionic conductivity and transference number data indicated the dominance of ion-type charge transport in these specimens. The electrochemical cells have been fabricated using PVC + PEO + KBr electrolyte for which the open-circuit voltage and short-circuit current are 3.2 V and 1380 mu A, respectively.