TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Composition: The ceramic composite is of formula Li1.4+a'Al0.4+b'Ge1.6+c'Md'P3+e'O12+f' (II). The ceramic compound of formula (III) is at least one selected from Li1.3Al0.3Ge1.7(PO4)3, Li1.4Al0.4Ge1.6(PO4)3, Li1.5Al0.5Ge1.5(PO4)3, Li1.6Al0.6Ge1.4(PO4)3, and Li1.7Al0.7Ge1.3(PO)4)3.a', b' and c'=-0.1 to 0.1;d'=0.04-0.4;e=0-0.1;f'=0-0.9.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Anode: The protected anode further involves an intermediate layer between the anode and the lithium ion-conductive protective layer, the intermediate layer comprising at least one selected from a liquid electrolyte including a separator, a non-aqueous solvent, and a lithium salt; an inorganic solid electrolyte membrane; a polymer solid electrolyte membrane; a gel solid electrolyte membrane; and a lithium ion-conductive solid electrolyte membrane. The intermediate layer further comprises an insulating inorganic filler. The lithium ion-conductive protective layer is porous. The lithium ion-conductive protective layer further comprises a cross-linkable first polymer, which is disposed in pores of the lithium ion-conductive protective layer. The cross-linkable first polymer has a lithium ion conductivity of less than or equal to 10-4 Siemens per centimeter. An amount of the cross-linkable first polymer is 0.01-20 pts.wt.. The lithium ion-conductive protective layer has a thickness of 1-500 micrometer. The lithium ion-conductive protective layer has a moisture permeability equivalent to pass less than or equal to 100 milligrams per liter of Cl- ions per day. Preferred Method: The method further involves filling pores in the lithium ion-conductive protective layer with a cross-linkable polymer. Preferred Components: The lithium salt comprises at least one selected from LiPF6, LiBF4, LiSbF6, LiAsF6, LiN(SO2C2F5)2, Li(CF3SO2)2N, LiC4F9SO3, LiClO4, LiAlO2, LiAlCl4, LiN(CxF2x+1SO2)(CyF2y+1SO2), LiF, LiBr, LiCl, LiI, and lithium bis(oxalato) borate. The insulating inorganic filler is selected from SiO2, BaTiO3, TiO2, Al2O3, and Li2CO3. The intermediate layer has an ionic conductivity of greater than or equal to (2x 10-3) Siemens per centimeter, a lithium ion transfer coefficient of greater than or equal to (-0.16), and a lithium ion mobility of greater than or equal to (1.1x 10-6) square centimeters per volt-seconds.x and y=natural numbers.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The cross-linkable first polymer is a thermoset. The cross-linkable first polymer comprises at least one selected from an epoxy, an acryl, a polyamide, a polyimide, a polyimide amide, a polycarbonate, a polyester, a phenol, a polyurethane, and a melamine. The separator comprises at least one selected from a polyethylene oxide-based polymer, a polypropylene-based polymer, a polyacrylonitrile-based polymer, a polyvinylidene-fluoride-based polymer, and a polymethylmethacrylate-based polymer. EXAMPLE - No suitable example is given.