NOVELTY - A liquid-free rechargeable lithium-air cell (10) comprises an anode (14) comprising a lithium metal; an oxygen cathode (16); and a lithium ion-conducting solid electrolyte (12) separating the anode and cathode and selected from at least one polymer-ceramic electrolyte and/or glass ceramic electrolyte; where the solid electrolyte contains a dielectric additive (a1) selected from lithium oxide, boron nitride, silica, alumina, calcium oxide, zirconium oxide, titanium oxide, lithium aluminate, and silicon nitride.    USE - As liquid-free rechargeable lithium-air cell (claimed) used as fuel source, for lithium-air batteries, fuel cells, and electrochemical sensors; and for portable electronics, cell phones, laptop computers, cameras, and automotive applications.    ADVANTAGE - The lithium-air cell has a Coulombic efficiency during a discharge to charge cycle of greater than 98% at a temperature of 65-105 degrees C; and has an open circuit voltage of 2-3.8V. The solid electrolytes based on polymer-ceramic and glass-ceramic materials have enhanced ionic transport and catalytic activity and provide liquid-like conductivity. The electrolytes are compatible with lithium metal, stabilizing the surface of lithium, and are stable in normal environmental conditions. Thus, the safety issues due to the reactivity of lithium is use a solid state, inorganic electrolyte which isolates lithium from moisture and atmospheric gases and prevents dendritic shorts. The rechargeable lithium-air cell minimizes containment and transportation issues; has the open circuit voltage of 3 V, which is 3 times that of the hydrogen-air cell; exhibits excellent thermal stability and rechargeability in the temperature range of 30-105 degrees C.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a method (M1) of forming a solid electrolyte having enhanced ionic transport for use in a lithium-air cell involving providing a solid electrolyte selected from at least one polymer-ceramic electrolyte and/or glass-ceramic electrolyte; adding the dielectric additive (a1) to the solid electrolyte; where the solid electrolyte exhibits increased ionic transport when placed in a lithium-air cell and exhibits a conductivity of 10-6 and 10-1 Scm-1 at room temperature; and    (2) a solid electrolyte formed by the method (M1) comprising a polymer-ceramic composite comprising polyethylene oxide doped with LiN(SO2CF2CF3)2(LIBETl) and containing from 0.01-10 wt.% lithium oxide (Li2O); polymer-ceramic composite comprising polyethylene oxide doped with LiBETl and containing 0.01-10 wt.% boron nitride (BN); the glass-ceramic electrolyte containing 0.01-5 wt.% Li2O, where the solid electrolyte is in the form of a laminate.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic illustration of an electrochemical device showing the anode, electrolyte, cathode, and flow of ions and electrons.    Lithium-air cell (10)    Solid electrolyte (12)    Lithium anode (14)    Oxygen cathode (16)    Glass-ceramic membrane (18)    Polymer-ceramic membranes (20, 22)