Abstract:
The present invention relates to a method for reforming the surface of a carbon fiber, which can be used as the carbon electrode of a redox flow battery, a carbon fiber having the surface thereof reformed thereby, and a carbon electrode and a redox flow battery including the carbon fiber having the surface thereof reformed thereby. The method for reforming the surface of a carbon fiber according to the present invention comprises the steps of: supporting the carbon fiber on a solvent containing a hydroxyl group; treating, with supersonic waves, the carbon fiber supported on the solvent containing a hydroxyl group; and thermally treating the carbon fiber treated with supersonic waves. The carbon fiber having the surface thereof reformed according to the present invention can improve the electrochemical properties of the carbon fiber by maximizing the specific surface area of the carbon fiber because the surface of the carbon fiber is reformed to be hydrophilic and has mesopores formed thereon. Therefore the carbon fiber having the surface thereof reformed according to the present invention can be used as the carbon electrode of a redox flow battery.
Abstract:
The present invention relates to an energy storage device to provide a lithium-ion capacitor including a negative electrode and a positive electrode to which a lithium based metallic oxide is added through a formation method (battery activation method) using simplified processing steps and a manufacturing method for the same. [Reference numerals] (AA) Start;(BB) End;(S10) Prepare a lithium metal oxide;(S20) Produce an anode electrode and a cathode electrode;(S30) Produce a capacitor using the produced electrodes
Abstract:
PURPOSE: A method for preparing an anode active material is provided to easily prepare titanium oxide with a size of several nanometers in a nitrogen-doped porous carbon nanotube, and allow an appropriate control of the nitrogen content, the titanium oxide content, the pore size, the diameter of the carbon nanotube, and the size of titanium oxide. CONSTITUTION: A method for preparing an anode active material comprises the following steps. An electro-spinning solution is prepared by mixing a first solution in which a metal oxide precursor is dissolved, a second solution in which a polymer as a carbon nanotube precursor is dissolved, and an ionic liquid solution for nitrogen doping and forming of a porous structure (S10). The electro-spinning solution is electro-spun to prepare a composite material of metal oxide-nitrogen-porous carbon nanotube (S20). The composite material is thermally treated (S30). Further, an anode is formed by coating a current collector with a slurry in which the anode active material, a conducting agent, a binding agent, and a solvent are mixed. [Reference numerals] (AA) Start; (BB) End; (S10) Produce electro-spinning solution; (S20) Produce metal oxide-nitrogen-porous carbon nanofiber composite; (S30) Thermally treat composite
Abstract:
PURPOSE: A redox flow battery is provided to exclude a bipolar plate frame by integrating a manifold and a bipolar plate and to reduce a work time for laminating stacks. CONSTITUTION: A redox flow battery includes a pair of end plates which has an electrolyte inlet and an electrolyte outlet; a current collector inside the end plate; an end manifold which is placed inside the current collector, has a bipolar plate (110) mounted on a side corresponding to the current collector and an electrode inserted onto the opposite side; and an integrated composite electrode cell which is placed between the end manifolds and includes a first manifold (121) in which a first electrode is inserted, a second manifold (122) in which a second electrode is inserted, and the bipolar plate placed between the first and second manifolds.
Abstract:
PURPOSE: A redox flow battery is provided to improve output of a battery by a simple method without sudden increase of volume. CONSTITUTION: A redox flow battery has a structure formed by laminating two or more unit cells which includes manifold(40) with reaction parts(43,73,73') having different polarity from each other. The redox flow battery has a first end plate(10) which has different electrolyte inlets(11,11'); a second end plate(20) which has electrolyte outlets(21,21'); two or more current collectors(30,30') having different polarities; and a series and parallel connection element(80) formed on the front side of the second end plate.
Abstract:
PURPOSE: A method for manufacturing a lithium-ion capacitor according to a pre-doping process of lithium ions and the lithium-ion capacitor therefrom are provided to supply stable charge-discharge characteristics in greater than 4.0V by including an cathode electrode between an anode electrode and a lithium metal electrode. CONSTITUTION: A lithium-ion capacitor(100) includes a case(110), electrolyte(120) and an electrochemistry cell(130). The chemistry cell includes an anode electrode(131), a cathode electrode(135) and a lithium metal electrode(139). A lithium ion of the lithium metal electrode is carried to the cathode electrode. The cathode electrode and the anode electrode are electrochemically contacted. The absorbed lithium ion on the anode electrode is carried to the cathode electrode. The lithium metal electrode and the cathode electrode are electrochemically contacted.
Abstract:
PURPOSE: An electrode material for a capacitor and the capacitor manufactured by using the same are provided to maximize charging and discharging by preventing the decrease of specific capacitance due to a current density rise and implementing high energy density. CONSTITUTION: Electrode materials are obtained by thermally processing lithium starting materials and manganese starting materials at 300 to 600 degrees centigrade for 1 to 40 hours. Lithium is an electrode with an initial discharge capacitance of 20 to 100 mAh/g. A unit cell of a capacitor has energy density of 1 to 80 Wh/Kg within 0 to 5 V.
Abstract:
PURPOSE: A method for manufacturing a carbon electrode through electrochemical activation is provided to rapidly activate a carbon electrode, to increase an oxygen functional group of the carbon electrode, to improve the capacity and efficiency of the redox flow battery, and to reduce the resistance of an electrode. CONSTITUTION: A method for manufacturing a carbon electrode(30) through electrochemical activation comprises the steps of: filling a mixed solution of distilled water and acid in a cell electrode part in which a unit cell or a stack is assembled; and electrochemically activating the electrode part. The mixed solution is a solution of 0.1~10 M molarity in which one or two or more from the group consisting of sulfuric acids, nitric acids, and phosphoric acids are mixed.
Abstract:
PURPOSE: Oxide electrode materials for an electrochemical capacitor are provided to implement high energy density and prevent the reduction of specific capacitance. CONSTITUTION: An electrode for a capacitor includes oxide made of Li2O1-zXz yMO2-zXz and LiaMbOc-2zX2z. The a, b, and c are integral numbers and satisfy 6
Abstract translation:目的:提供用于电化学电容器的氧化物电极材料,以实现高能量密度并防止比电容的降低。 构成:用于电容器的电极包括由Li2O1-zXz yMO2-zXz和LiaMbOc-2zX2z制成的氧化物。 a,b和c是整数,满足6 <= a + b + c <33。 Y满足1 <= y <= 5。 M是Ti,Cr,Mn或Zr。 X是F,Cl,S,Br或I.Z满足0
Abstract:
An electrolyte additive for a super capacitor, a manufacturing method thereof, and an electrolyte solution including the same are provided to perform an overcharge protection effect by suppressing decomposition of an electrolyte. A 4-DAP(Dimethylamino Pyridine) as a compound having a polymer precursor, a compound including a reversible redox function, and a reaction activator is added to a solvent. A mixing solution is agitated in a room temperature. An N,N'-DCC(Dicyclohexylcarbodiimide) solution is slowly added to an agitated mixing solution. The mixing solution is agitated in a room temperature again. A re-agitated mixing solution is filtered. The solvent is evaporated in a rotation evaporator. A solid sample remaining after evaporation is re-crystallized.