A solid lithium electrolyte via addition of lithium isopropoxide to a metal-organic framework with open metal sites.

The uptake of (LiOPr)-Pr-i in Mg-2(dobdc) (dobdc(4-) = 1,4-dioxido-2,5-benzenedicarboxylate) followed by soaking in a typical electrolyte solution leads to the new solid lithium electrolyte Mg-2(dobdc)center dot 0.35LiO(i)Pr center dot 0.25LiBF(4)center dot EC center dot DEC (EC = ethylene carbonate; DEC = diethyl carbonate). Two-point ac impedance data show a pressed pellet of this material to have a conductivity of 3.1 x 10(-4) S/cm at 300 K. In addition, the results from variable-temperature measurements reveal an activation energy of just 0.15 eV, while single-particle data suggest that intraparticle transport dominates conduction.