TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The ceramic support comprises a material comprising silica, quartz, glass, boron carbonate, silicon carbide, alumina, titania, silica tungstate, sintered valve metal oxides or non-conductive diamond or diamond-like coatings or a ceramic comprising alumina (preferred), silica or silicon carbide. The ceramic support has a thickness of 1-50 microns, preferably 7.5-15 microns. Preferred Method: In the method of preparing the solid polymer electrolyte composite membrane, the step of providing the ceramic support comprises providing a metal sheet and electrochemically oxidizing the metal sheet.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: In the solid polymer electrolyte composite membrane, each of the many pores extends in a straight line perpendicularly from the top surface to the bottom surface, where the pores are arranged in a non-random pattern and at least some of the pores are arranged in a honeycomb pattern. The pores are cylindrical in shape. The pores have a diameter of 0.01-200 microns, preferably 0.01 to 100 microns. The pores constitute 20-95%, preferably 40-70% of the ceramic support. The first solid polymer electrolyte is polymer compositions that contain metal salts, polymeric gels that contain electrolyte or ion exchange resins (preferred). The first solid polymer electrolyte is perfluorosulfonic acid polymer, where the perfluorosulfonic acid polymer has an equivalent weight of 200-2000, preferably 500-1200. In the polymer electrolyte composite membrane, all of the pores is completely filled with the first solid polymer electrolyte, where the top and bottom surfaces of the ceramic support are covered with the first solid polymer electrolyte. The solid polymer electrolyte composite membrane has a thickness of 5-300 microns, preferably 7.5-200 microns. The solid polymer electrolyte composite membrane has an ionic conductivity of 0.001-0.7 S/cm at room temperature with a relative humidity of 100%. EXAMPLE - Many pores were formed in a piece of 25 mu m thick silica film using a excimer laser and near-field imaging. The diameter of each pore was 20 mu m and the distance between the centers of the pores was 60 mu m. Nafion (RTM: Perfluorinated resin sulfonic acid) was coated onto the porous film, and the product was then heated to dry off the solvent from the coated perfluorinated resin sulfonic acid solution and cured to obtain the solid polymer electrolyte composite membrane.