where RA,B is the distance between the peripheral atoms and rA and rB the ionic radii of the peripheral ions A and B. In the optimal case, Rb should be equal to the diameter of Li + which is 1.18 Å. If the bottleneck is too large or too small, thermal energy may be required to adjust the bottleneck size, which increases the activation energy for a jump process. Using the Shannon radii of Cl -and N