IONIC TRANSPORT AND BATTERY CHARACTERIZATION STUDIES ON NAI-NA2O-B2O3TERNARY GLASSY SYSTEM

Glasses in the ternary system xNaI-yNa(2)O-[100 - (x + y)]B2O3 prepare d by a melt quenching method are characterized by using different expe rimental techniques such as X-ray diffraction, ionic transference numb er and conductivity. The conductivity is found to vary in a nonlinear manner with change in the NaI/Na2O ratio. The highest conductivity gla ss composition is used as an electrolyte in the fabrication of a solid -state electrochemical cell. A decomposition potential of 2.5 V is det ermined for the electrolyte. The discharge characteristics of the cell are investigated at ambient temperature and various cell parameters a re determined. The open-circuit voltage and short-circuit current of t he cell are 2.7 V and 1600 mu A, respectively.