IONIC TRANSPORT AND BATTERY CHARACTERIZATION STUDIES OF BARIUM-DOPED POTASSIUM YTTRIUM FLUORIDE

Pure and barium fluoride doped potassium yttrium fluoride materials we re synthesized using the solid state reaction method and were characte rized by X-ray diffraction, transference number and transient ionic cu rrent measurements. In all the samples the conductivity was found to b e mainly ionic while the electronic conductivity was found to be small . Solid state batteries were fabricated in the configuration K/electro lyte/(I-2 + C + electrolyte) with KYF4 and KYF4:BaF2 as the solid elec trolytes. Their discharge characteristics were studied for a load of 1 00 K Omega at 313 K. Open circuit voltage (OCV) and short circuit curr ent (SCC) of the cells range from 2.38 to 2.82 V and 650 to 2340 mu A, respectively. Various cell parameters were evaluated.