(136g) Self-Diffusion of Monovalent Ions in Highly Concentrated Liquid and Solid Electrolytes

We analyze data concerning tracer and self-diffusion of monovalent ions (K+, Na+, Li+,H+) in highly concentrated aqueous solutions of LiCl, NaCl and KCl ranging from 0.1 to 4 mol/l and self-diffusion coefficients of Na+ in weak-acid ion exchanger rods (cross-linked polymethacrylic acid) in which the molarity of the counter-ion varied from 0.8 to 3.5 mol/l and that of water from 40 to 46 mol/l. To analyze the data we employ the generalized diffusion Nernst-Planck equation which was recently derived from the generalized Stefan-Maxwell equation. When the equation is applied to the solid electrolyte the polymer is modelled as a dusty gas, where the polymer species is immobile. The same statistical mechanics equation correlates all experimental data. We can conclude that solid and liquid electrolytes are solutions which only differ by the fact that the fixed charges in the solid ion-exchanger are immobile.