Study of self-diffusion of alkali metal cations inside a Nafion membrane
Abstract
A
novel radiotracer method, based on the rotating electrode technique used in electrochemistry, was used for the
study of the self-diffusion properties of ions in ion-exchange membranes; the self-diffusion coefficients
of Na+ and Cs+ ions were determined in a Nafion 117 membrane. The influence of electrolyte concentration and temperature
was investigated and an important influence of the former was observed. The results indicate that the diffusion process inside the membrane for Na+ ion depends linearly on the