TECHNOLOGY FOCUS - ELECTRONICS - Preferred Battery: The battery case is a pouch type case consisting of a laminate sheet comprising a resin layer and a metal layer.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic particle is at least one or two selected from barium titanate (BaTiO3), lead (Pb)(zirconium (Zr), titanium (Ti))O3 (lead zirconate titanate (PZT)), Pb1-xLaxZr1-yTiyO3 (PLZT), Pb(Mg3Nb2/3)O3-PbTiO3 (PMN-PT), hafnia (HfO2) strontium titanate (SrTiO3), stannous oxide (SnO2), cerium dioxide (CeO2), magnesium oxide (MgO), nickel oxide (NiO), calcium oxide (CaO), zinc Oxide (ZnO), yttrium oxide (Y2O3), zirconium oxide (ZrO2), aluminum oxide (Al2O3) and/or titanium dioxide (TiO2); and has a particle diameter of 0.001-10 mu m.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The first solvent is at least one or two selected from acetone, tetrahydrofuran, methylene chloride, chloroform, dimethyl formamide (DMF), N-methyl-2-pyrrolidone (NMP), cyclohexane and/or water.    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: The inorganic particle is added to the prepared solution after dispersed in a second solvent. The second solvent has an evaporation rate different from that of the solvent for dissolving the organic polymer (that is, the first solvent) and is selected from ketones and alcohols. The second solvent is methanol or methylethylketone (MEK). In the method, where lowered interfacial friction between the composite membrane and the mandrel is achieved by reducing a molecular weight of the organic polymer as the binder. Preferred Components: The organic polymer is at least one or two selected from polyvinylidene fluoride, polyvinylenefluoride-co-hexafluoropropylene, polyvinylidenefluoride-co-trichloroethylene, polyvinylidenefluoride-chlorotrifluoroethylene, polymethylmethacrylate, polyacrylonitrile, polyvinylpyrrolidone, polyvinylacetate, ethylene vinyl acetate copolymer, polyethyleneoxide, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, cyanoethylpullulan, cyanoethyl polyvinylalcohol, cyanoethyl cellulose, cyanoethyl sucrose, pullulan, carboxy methyl cellulose, acrylonitrile styrene butadiene copolymer, or polyimide, (preferred polyvinylidene fluoride-chlorotrifluoroethylene). The organic/inorganic composite layer includes microfine pores having a diameter of 0.1-50 mu m and permeability (or porosity) of 100-1000 sec/100cc. A coating thickness of the organic/inorganic composite layer is 1-10 mu m. The interfacial friction coefficient is not greater than 0.25. The organic polymer has a molecular weight of 100000 to 1000000 when the organic polymer is polyvinylidene fluoride (PVdF). The coating material is diamond like carbon (DLC). EXAMPLE - A cathode sheet was fabricated by adding lithium cobalt oxide (95 wt.%) as cathode active material, Super-P (conductive material) (2.5 wt.%), polyvinylidenefluoride (PVdF) (binder) (2.5 wt.%) to N-methyl-2-pyrrolidone (NMP) as a solvent to prepare a cathode mixture slurry, and then, applying the slurry to both sides of an aluminum foil, drying and compressing the same. An anode sheet was fabricated by adding graphite (95 wt.%) as an anode active material, Super-P (conductive material) (1.5 wt.%), PVdF (3.5 wt.%) to NMP to prepare an anode mixture slurry, and then, applying the slurry to both sides of a copper foil, drying and compressing the same. An organic/inorganic composite porous membrane was fabricated by the following procedure: Polyvinylidenefluoride-chlorotrifluoroethylene (PVdF-CTFE) copolymer (5 wt.%) was added to acetone as a first solvent and dissolved at 60 degrees C for 3 hours to prepare a mixture solution. After 3 hours, the polymer solution was cooled to room temperature and barium titanate (BaTiO3) powder dispersed in methylethylketone as a second solvent was added to the cooled solution (8-12 wt.%) relative to the total weight of the solution, followed by agitating at room temperature for 1 hour. After a porous substrate made of ethylene material was immersed in the prepared mixture solution through dip- coating, the coated substrate was placed in a convection oven and dried at 90 degrees C. A coating thickness was controlled to about 5 mu m. As a result of measuring porosity with a porosimeter, it was found that an active layer coated on the polyethylene membrane had a pore size of 0.1-1 mu m and a porosity of 30% (400sec/100cc). The cathode sheet, the separation membrane and the anode sheet were sequentially stacked and wound using a mandrel to fabricate a jelly-roll structure. The wound jelly-roll was fixed by attaching a seal tape on one outer side of the jelly-roll, and then, compressed to form a plate type product.