[165] using metadynamics simulation and correlation analysis between activation energy and other physical properties. The metadynamics simulations study found an increase in the activation energy of cation migration with a lower coordination number of H 2 O. In addition, in the correlation analysis, the activation energies of all divalent ion migrations show similar changes with respect to the number of H 2 O in the structure, suggesting that these ion migrations are governed by hydration. A similar behavior was also observed in Li 2 Sn 2 S 5 -nH 2 O . Moreover, electrochemical cells utilizing ZnB 12 H 12 -12 H 2 O as a solid electrolyte demonstrated reversible Zn 2+ migration, highlighting its potential as a Zn 2+ conductor in all-solid-state Zn batteries. Campos et. al. also identified the key factors that determine the ionic conductivity in this system, such as the cation valencies, the water content, the cation-water coordination number, and the cation-anion distance.