Abstract: A method of preparing layered lithium-chromium-manganese oxides having the formula Li[CrxLi(1/3?x/3) Mn(2/3?2x/3)]O2 where 0.1?X?0.5 for lithium batteries. Homogeneous precipitation is prepared by adding lithium hydroxide (LiOH) solution to a mixed solution of chromium acetate (Cr3(OH)2(CH3CO2)7) and manganese acetate ((CH3CO2)2Mn.4H2O), while precursor powders are prepared by firing the precipitation. After that, the precursor powders are subjected to two heat treatment to yield Li[CrxLi(1/3?x/3) Mn(2/3?2x/3)]O2 with ?-LiFeO2 structure.

Abstract: Provided is a lithium-cobalt-manganese oxide having the formula Li[CoxLi(1/3-x/3)Mn(2/3-2x/3)]O2 (0.05<X<0.9) which provide a stable structure and a superior discharge capacity, and the method of synthesizing of the same. The method of synthesizing the oxides according to the present invention comprises: preparing an aqueous solution of lithium salt, cobalt salt, and manganese salt; forming a gel by burning the aqueous solution; making oxide powder by burning the gel; forming a fine oxide powder having a layered structure by the twice of treatments. The lithium-cobalt-manganese oxide synthesized according to the present invention has a stable and superior electrochemical characteristic. The oxide is synthesized by simple and low cost heat treatment process.

Abstract: Provided is a method for preparing a Li—Mn—Ni oxide for a lithium secondary battery having a composition of Li[NixLi(1/3-2x/3)Mn(2/3-X/3)O2 (0.05<X<0.6), including the steps of: a] preparing an aqueous solution by resolving lithium salt, manganese salt and nickel salt into distilled water; b) forming gel by heating the aqueous solution; c) preparing oxide powder by burning the gel; d) performing a first thermal treatment on the oxide powder, and grinding the resultant; and e) performing a second thermal treatment on the resultant powder, and grinding the resultant. The technology of the present invention can prepare a Li—Mn—Ni oxide having a composition of Li[NixLi(1/3-2x/3)Mn(2/3-x/3)O2 (0.05<X<0.6) to be used as a cathode material of a lithium secondary battery having a stable and excellent electrochemical characteristics.

Abstract: A method of preparing layered lithium-chromium-manganese oxides having the formula Li[CrxLi(1/3-x/3) Mn(2/3-2x/3)]O2 where 0.1≦X≦0.5 for lithium batteries. Homogeneous precipitation is prepared by adding lithium hydroxide (LiOH) solution to a mixed solution of chromium acetate (Cr3(OH)2(CH3CO2)7) and manganese acetate ((CH3CO2)2Mn.4H2O), while precursor powders are prepared by firing the precipitation. After that, the precursor powders are subjected to two heat treatment to yield Li[CrxLi(1/3-x/3) Mn(2/3-2x/3)]O2 with &agr;-LiFeO2 structure.

Abstract: A cathode active material for a lithium secondary cell used in a cellular phone is disclosed. The cathode active material for the lithium secondary cell and the method the same having a high capacity and a long lifetime, different from LiCoO2 and LiMn2O4, Li(Ni, Co)O2, and V-system oxide that has been researched as the active material for substituting LiCoO2 are provided. The cathode active material for the lithium secondary cell in the next formula 1 is obtained by heating or chemically treating diadochite [Fe2(PO4)(SO4)(OH).6H2O] that is the mineral containing PO43−, SO42−, and OH−.

Abstract: The present invention relates to a method of manufacturing a cathode electrode for a secondary lithium battery using vanadium oxide. Vanadium oxide is dissolved in an aqueous solution containing H2O2 to form a gel. Thus, the gel can be applied to a metal support even when the binder is not used or the binder of a small amount is used. If vanadium oxide of an adequate amount is put into the aqueous solution containing. H2O2, a transparent aqueous solution is formed while oxygen is generated. The aqueous solution is then changed to a gel state of a viscosity as the time elapses. A small amount of a conductive material and a binder are added in the course that the gel is formed, and are then uniformly mixed with vanadium oxide being an active material, so that a slurry is formed. As the slurry has a high viscosity, it can be applied to the metal support even with a small amount of the binder. Further, as the conductive material, the binder, etc.

Abstract: The present invention provides a new organic-inorganic (PDMcT+PANI)/V2O5 composites electrode material in which two different organic polymers are intercalated into the V2O5 interlayer, which shows higher discharge capacity than each isolated polymers and V2O5. Therefore, it can be used as a cathode in secondary lithium battery.

Abstract: A hybrid power device having three electrodes and a method for fabricating the same are provided. The hybrid power device includes a lithium secondary battery and a supercapacitor in a cell and has three electrodes. The three electrodes have a common electrode including a positive electrode of the lithium secondary battery, which is as the positive electrode of the supercapacitor, a negative electrode of the lithium secondary battery including lithium metal and the other electrode of the supercapacitor. This hybrid power device is superior to that of a lithium secondary battery, and further is more economical and practical than a case where a lithium secondary battery and a supercapacitor are individually fabricated and used as a hybrid.

Abstract: The redox supercapacitor of the present invention utilizes a conducting polyaniline doped with lithium salt, protonic acid, or nucleophilic dopant for fabricating an active electrode, thereby reducing a surface resistance and simplifying fabrication steps. The redox supercapacitor includes a positive electrode plate incorporating therein an electrode active material provided with a polyaniline powder doped with a lithium salt, protonic acid, or nucleophilic dopant, a negative electrode plate incorporating therein an electrode active material provided with a polyaniline powder doped with a lithium salt, protonic acid, or nucleophilic dopant and a polymer electrolyte membrane disposed between the positive electrode plate and the negative electrode plate.

Abstract: The present invention provides a new organic-inorganic (PDMcT+PANI)/V2O5 composites electrode material in which two different organic polymers are intercalated into the V2O5 interlayer, which shows higher discharge capacity than each isolated polymers and V2O5. Therefore, it can be used as a cathode in secondary lithium battery.

Abstract: The present invention relates to a laminated ceramic composition which has a high dielectric constant and a low decrease rate of dielectric constant at DC bias, which can be used for bypass of computer module IC. The present invention provides a ceramic condenser composition which comprises BaTiO.sub.3, TiO.sub.2, CeO.sub.2 and Sm.sub.2 O.sub.3 by the molar ratio to satisfy the equation of (1-X-Y)BaTiO.sub.3 -X(CeO.sub.2)-Y(Sm.sub.2 O.sub.3)-(1.5X+3Y)TiO.sub.2 (wherein, 0.01<X+Y<0.05 and 0.015<1.5X+3Y<0.15). The composition has an excellent dielectric characteristics, since it has a high dielectric constant of 7000 or more at a temperature range of 50.degree. to 70.degree. C. which permits normal operations of IC, and a decrease rate of dielectric constant of below 10% at DC bias of 1 V/.mu.m. Accordingly, the ceramic composition of the invention can be applied for the development of a laminated ceramic condenser for bypass of computer module IC.