where z CN is the effective coordination number in the two-dimensional lattice, E is the energy of the interaction between the electrolyte components, when k=i and m=w: E iw is the energy of binding of the ion and the water molecule (taken equal to the free binding energy of the components in the following estimations), E ww is the energy of binding of the water molecules into a dimer, E ii is the energy of binding of the ions with each other.