Abstract: In a safety vent part and an electric energy storage device having the same, the safety vent part includes a plate coupled to the device, a metal sheet and a metal cap. A hole having a step portion is formed through the plate, and is in communication with an interior of the device. The metal cap having an exhaust nozzle corresponding the hole is coupled into the step portion by a tight fit. The metal sheet is disposed between a bottom surface of the step portion and the metal cap. When an internal pressure of the device is higher than a predetermined breaking pressure, the internal pressure of the device breaks the metal sheet. A gas generated abnormally in the device is exhausted through the hole and exhaust nozzle.

Abstract: An electric energy storage device for reducing electric resistance between the anode/cathode electrodes and their terminals is disclosed. In the electric energy storage device, an anode electrode and a cathode electrode are stacked to have offset areas with predetermined margins and an insulating film is inserted therebetween. And, the stacked electrodes between which the insulating film is inserted is rolled up so as to form an electrode body. A plate type anode terminal and a plate type cathode terminal which have the thread-like unevenness at their bottoms are connected to a top and bottom of the rolled electrode body respectively. A metal layer is formed on both contact areas of the anode and cathode electrodes by plasma or arc spray.

Abstract: An electric energy storage device includes a first electrode, a gel type ionic conducting polymer electrolyte separator formed on the first electrode, and a second electrode corresponding to the first electrode. The energy storage device has an increased unit storage capacitance and more minimized size by using the gel type ionic conducting polymer electrolyte separator. Also, the energy storage device produces a reduced resistance by the gel type ionic conducting polymer electrolyte separator, such that the high frequency response characteristic is improved, the available frequency region is enlarged and the allowable ripple current is increased.

Abstract: Disclosed is an electric energy storage device having a large capacity and includes a thin active material layer and a plurality of integrated electrodes. The electric energy storage device comprises at least one electrode group in which a cathode, a separator and an anode are in regular sequence, repeatedly integrated and wound into a plate shape. The electrode group has lead lines collected at a predetermined place for a connection with a terminal. Since the cathode and anode are wound with the insertion of the separator between them, the increase of the number of the lead lines is advantageous. In addition, the lead lines can be preferably formed by cutting each portion of the electrode at once by utilizing an apparatus such as a press, the manufacture of the electric energy storage device having a large capacity is advantageous.

Abstract: A metal oxide electrode for a supercapacitor and a manufacturing method thereof are disclosed. Potassium permanganate is absorbed on a conductive material, such as carbon or activated carbon, and mixed with a solution including manganese acetate so as to form amorphous manganese oxide. Amorphous manganese oxide powder is grounded to a powder which is mixed with binder to form an electrode having a predetermined shape. The electrode reduces equivalent serial resistance and enhances high frequency characteristics since the contact area and the adhesion strength between the manganese oxide and the conductive carbon are improved. Also, the electrode has high capacitance suitable for a supercapacitor, which is manufactured therefrom at a greatly reduced cost.

Abstract: An electric energy storage device includes a first electrode, a gel type ionic conducting polymer electrolyte separator formed on the first electrode, and a second electrode corresponding to the first electrode. The energy storage device has an increased unit storage capacitance and more minimized size by using the gel type ionic conducting polymer electrolyte separator. Also, the energy storage device produces a reduced resistance by the gel type ionic conducting polymer electrolyte separator, such that the high frequency response characteristic is improved, the available frequency region is enlarged and the allowable ripple current is increased.

Abstract: Disclosed are a conducting polymer coated electrode of a metal oxide electrochemical pseudocapacitor having an improved performance and a method of manufacturing the same. The electrode includes a current collector and an active material coated on the current collector. The active material includes metal oxide and is coated with a conducting polymer on a surface thereof. Metal oxide electrochemical pseudocapacitor includes a plurality of electrodes described above, an electrolyte and a separator positioned between the electrodes to prevent a contact between the electrodes. The metal oxide pseudocapacitor including the electrode coated with the conducting polymer having a high electric conductivity, has an increased storing amount of electric energy and a decreased ESR to improve a high power performance.

Abstract: A novel electric energy storage system having an increased storage energy. This system includes a plurality of electrodes, an organic electrolyte including a solvent and a solute and a separator inserted between the electrodes for preventing a contact between the electrodes. According to the present invention, an organic electrolyte is used to increase the storage amount of the energy and to improve an electric conductivity. A capacitor having various designs can be manufactured.

Abstract: An electric energy storage device includes a first electrode, a gel type ionic conducting polymer electrolyte separator formed on the first electrode, and a second electrode corresponding to the first electrode. The energy storage device has an increased unit storage capacitance and more minimized size by using the gel type ionic conducting polymer electrolyte separator. Also, the energy storage device produces a reduced resistance by the gel type ionic conducting polymer electrolyte separator, such that the high frequency response characteristic is improved, the available frequency region is enlarged and the allowable ripple current is increased.

Abstract: A metal oxide electrode for a supercapacitor and a manufacturing method thereof are disclosed. Potassium permanganate is absorbed on a conductive material, such as carbon or activated carbon, and mixed with a solution including manganese acetate so as to form amorphous manganese oxide. Amorphous manganese oxide powder is grounded to a powder which is mixed with binder to form an electrode having a predetermined shape. The electrode reduces equivalent serial resistance and enhances high frequency characteristics since the contact area and the adhesion strength between the manganese oxide and the conductive carbon are improved. Also, the electrode has high capacitance suitable for a supercapacitor, which is manufactured therefrom at a greatly reduced cost.

Abstract: A metal oxide electrode for a supercapacitor and a manufacturing method thereof are disclosed. Potassium permanganate is absorbed on a conductive material, such as carbon or activated carbon, and mixed with a solution including manganese acetate so as to form amorphous manganese oxide. Amorphous manganese oxide powder is grounded to a powder which is mixed with binder to form an electrode having a predetermined shape. The electrode reduces equivalent serial resistance and enhances high frequency characteristics since the contact area and the adhesion strength between the manganese oxide and the conductive carbon are improved. Also, the electrode has high capacitance suitable for a supercapacitor, which is manufactured therefrom at a greatly reduced cost.