CAPACITY DENSITY OF POSITIVE ELECTRODE IN SODIUM NICKEL CHLORIDE MOLTEN-SALT BATTERY/

The performance of the positive electrode in a sodium/nickel chloride cell has been investigated using a porous nickel matrix and a nickel n ag electrode in a basic AlCl3-NaCl melt. The capacity of the porous ni ckel electrode linearly related to the surface area, and the real capa city density (C.cm(-2)) ofthe nickel chloride electrode was independen t of its geometry. The capacity density significantly decreases as the current density becomes high or as the operating temperature becomes low especially below 225 degrees C. The dependence of the capacity den sity on the current density and the temperature can be explained by th e diffusion process of chloride ion in the nickel chloride layer.