IONIC-CONDUCTIVITY OF LITHIUM CONDUCTING SIO2 GELS AT ROOM-TEMPERATURE

Fresh silica gels have been used as hosts for liquid organic lithium e lectrolytes. The residual liquid inside the fresh gels was exchanged b y the solutions of selected lithium salts (lithium hexafluorophosphate , lithium tetrafluoroborate) in organic solvents: propylene carbonate (PC), dimethyl sulfoxide (DMSO), dimethyl formamide (DMF), 1,2-diethox yethane (DEE) and dimethyl carbonate (DMC). The immersion of the gels in solutions based on DEE, DMF and DMC leads to the fast deterioration of the gels. The gels immersed in the solutions based on PC and DMSO exhibit stable conductivities in the range of 10(-3) Scm(-1) at room t emperature. That conductivity is close to the conductivity of the corr esponding lithium salt solutions.