TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Cell: The glass-ceramic electrolyte is positioned between the first and second polymer-ceramic composite electrolytes. The solid electrolyte is electrochemically coupled to the anode. Preferred Method: The dielectric additive is added in an amount of 0.01-10 wt.%. The dielectric additive has a particle size of 5-10000 nm. Preferred Components: The solid electrolyte comprises the glass-ceramic electrolyte selected from lithium-aluminum-germanium-phosphate (LAGP), lithium-aluminum titanium phosphate (LATP), or their derivatives, and containing 0.01-5 wt.% Li2O; and the polymer-ceramic electrolyte comprising polyethylene oxide doped with LiN(SO2CF2CF3)2 (LiBETl) and containing 0.01-10 wt.% Li2O and 0.01-10 wt.% BN. The solid electrolyte comprises a laminate including: a first polymer-ceramic composite electrolyte formed from polyethylene oxide doped with LiN(SO2CF2CF3)2 (LiBETl) and including 0.01-10 wt.% Li2O; the glass-ceramic electrolyte containing 0.01-5 wt.% Li2O; and a second polymer-ceramic electrolyte formed from polyethylene oxide doped with LiN(SO2CF2CF3)2 (LiBETl) and including 0.01-10 wt.% boron nitride (BN). The laminate has a thickness of 1-2000 microns. The oxygen cathode comprises a carbon material and a lithium ion-conducting glass or glass-ceramic material selected from lithium aluminum germanium phosphate (LAGP), lithium-aluminum titanium phosphate (LATP), or their derivative. The oxygen cathode comprises 5-30 wt.% carbon and 70-95 wt.% of the glass-ceramic material. The oxygen cathode comprises a porous structure having 30-70% porosity. The oxygen cathode further comprises polytetrafluoroethylene.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polymer-ceramic electrolyte comprises poly(ethylene oxide) doped with a lithium salt selected from LiN(SO2CF2CF3)2, LiBF4, LiPF6, LiSbF6, LiAsF6, LiClO4, LiCF3SO3, LiN(SO2CF3)2, LiN(SO2C2F5)2, LiC(SO2CF3)3, LiN(SO3CF3)2, LiC4F9SO3, LiAlCl4, LiCl or LiI.