In recently, the introduction of neutral molecules has emerged as a promising strategy to enhance conductivity in complex hydride-based magnesium ion conductors. Such as introducing ether can also improve ionic conductivity for closo-type magnesium boron cluster salt (10 -3 mS cm -1 at 45 • C), reported by Mizuno et al. , a much higher conductivity than previous solid magnesium electrolytes. Kisu et al. further investigated the divalent conduction of zinc (Zn 2+ ) and magnesium (Mg 2+ ) in hydrated closo-type complex hydrides M B 12 H 12 -nH 2 O (M = Zn, Mg). Among the anhydrous and hydrated MB 12 H 12 -nH 2 O compounds (where n = 0-12 and M = Zn, Mg), ZnB 12 H 12 -12 H 2 O and MgB 12 H 12 -12 H 2 O exhibited exceptional ionic conductivities of 3.8 × 10 -5 and 6.1 × 10 -5 S cm -1 at 50 • C, respectively, surpassing their less-hydrated counterparts. NMR measurements provided insights into the rapid water exchange between crystal water molecules and cation solvation shell promotes Zn 2+ conduction in ZnB 12 H 12 -12 H 2 O. This was further confirmed by Campos et.