Patent application number | Description | Published |
20090160337 | Film for Improving Contrast and Plasma Display Panel and Display Device Including the Same - There is provided a film for improving contrast, the film including a plurality of stripes each having a section in the shape of one of a trapezoid, a triangle, with a decreasing width from a surface of the film to an inner portion of the film, a rectangle, and a parallelogram, having a constant width from the surface of the film to the inner portion of the film. In a cross-sectional view cut along a thickness direction of the film, a line connecting an inner edge of an inner portion of one stripe with an inner edge of an outer portion of another adjacent stripe forms a shielding angle of 15 to 50° with a normal line perpendicular to a surface of the film. | 06-25-2009 |
20100051607 | High-Frequency Inductive Heating Apparatus and Pressure-Less Sintering Method Using the Same - A high-frequency inductive heating apparatus of ceramic material, whereby the nonconductive ceramic specimen in which induced current is not generated at room temperature is rapidly heated in a preheating housing, and a pressure-less sintering method using the same, are disclosed. The high-frequency inductive heating apparatus includes a preheating housing placed in a chamber to preheat a ceramic material; an induction coil installed around the preheating housing for supplying induced current so that the preheating housing is heated; and a high-frequency current generator for supplying high-frequency current to the induction coil. According to the present invention, inductive heating is made possible of nonconductive ceramic material for which inductive heating has thus far been impossible because induced current is not generated at room temperature, so that rapid heating by the self-heating of the specimen of ceramic material is possible. | 03-04-2010 |
20100091933 | METHOD OF PRODUCING LARGE-GRAINED NUCLEAR FUEL PELLET BY CONTROLLING CHROME CATION SOLUBILITY IN UO2 LATTICE - In a method of producing large-grained nuclear fuel pellet, Cr-compound contained in an uranium oxide green pellet is reduced to Cr phase at 1,470° C. or below and maintained to the Cr phase, and the uranium oxide green pellet containing the Cr-compound is then sintered at 1,650° C.-1,800° C. in a gas atmosphere of oxygen potential at which Cr element in the uranium oxide green pellet becomes liquid phase. | 04-15-2010 |
20100254847 | METHOD FOR MANUFACTURING SINTERED ANNULAR NUCLEAR FUEL PELLET WITHOUT SURFACE GRINDING - A method for manufacturing an annular nuclear fuel pellet is provided. In the method, an annular nuclear fuel green compact whose lateral cross-section is a trapezoid is prepared. The thickness of the annular nuclear fuel green compact reduces along one direction of the central axis, and a green density of the nuclear fuel green compact increases along one direction of the central axis. The annular nuclear fuel green compact is sintered under a reducing gas atmosphere so that the annular nuclear fuel pellet is obtained. According to this method, the annular pellet which has uniform inner and outer diameters and small diametric tolerances along the pellet height is fabricated without grinding the pellet surfaces. | 10-07-2010 |
20100261047 | ELECTROCHEMICAL DEVICE HAVING DIFFERENT KINDS OF SEPARATORS - An electrochemical device includes a plurality of unit cells, each having a first separator and a cathode and an anode positioned at both sides of the first separator, and a continuous single second separator interposed between adjacent unit cells in correspondence with each other in a laminated pattern and arranged to surround each unit cell. The first separator includes a heat-resisting porous substrate having a melt point of 200° C. or above and a first porous coating layer formed on at least one surface of the heat-resisting porous substrate and made of a mixture of a plurality of inorganic particles and a binder polymer. The second separator includes a polyolefin porous substrate and a second porous coating layer formed on at least one surface of the polyolefin porous substrate and made of a mixture of a plurality of inorganic particles and a binder polymer. | 10-14-2010 |
20100266094 | DUAL-COOLED NUCLEAR FUEL ROD HAVING ANNULAR PLUGS AND METHOD OF MANUFACTURING THE SAME - A dual-cooled nuclear fuel rod and a method of manufacturing the same are provided. The nuclear fuel rod includes an outer cladding tube having a circular cross section, an inner cladding tube having an outer diameter smaller than an inner diameter of the outer cladding tube, and a length longer than the outer cladding tube, and located in parallel in the outer cladding tube, a pellet charged in a space between the outer and inner cladding tubes and generating energy by nuclear fission, and first and second end plugs coupling opposite ends of the outer cladding tube to stepped outer joints formed on outer circumferences of first ends thereof and coupling opposite ends of the inner cladding tube to stepped inner joints formed on inner circumferences of the first ends thereof. | 10-21-2010 |
20100291430 | SEPARATOR HAVING POROUS COATING LAYER AND ELECTROCHEMICAL DEVICE CONTAINING THE SAME - A separator includes a porous substrate having a plurality of pores, and a porous coating layer formed on at least one surface of the porous substrate and made of a mixture of a plurality of filler particles and a binder polymer. The filler particles include electrode active material particles that are electrochemically oxidized and reduced. The binder polymer includes a copolymer having (a) a first monomer unit with a contact angle to water of 0 to 49° and (b) a second monomer unit with a contact angle to water of 50 to 130°. This separator is useful for an electrochemical device, particularly a lithium secondary battery. This separator ensures improved thermal stability and increased capacity of the electrochemical device. Also, inorganic particles in the porous coating layer formed on the porous substrate are not disintercalated due to excellent peeling resistance of the porous coating layer while the electrochemical is assembled. | 11-18-2010 |
20100316903 | SEPARATOR HAVING POROUS COATING LAYER, METHOD FOR MANUFACTURING THE SAME AND ELECTROCHEMICAL DEVICE HAVING THE SAME - A separator includes a porous substrate having a plurality of pores; and a porous coating layer formed on at least one surface of the porous substrate and made of a mixture of a binder and a plurality of inorganic particles, wherein the binder includes a crosslinked binder. This separator may improve high temperature cycle performance, discharge characteristics and thermal resistance of an electrochemical device since the separator exhibits improved insolubility and impregnation to electrolyte and improved thermal resistance. | 12-16-2010 |
20100323230 | SEPARATOR FOR PROGRESSING UNITED FORCE TO ELECTRODE AND ELECTROCHEMICAL CONTAINING THE SAME - A separator includes a porous substrate having a plurality of pores; a porous coating layer formed on at least one surface of the porous substrate and made of a mixture of a plurality of inorganic particles and a binder polymer; and a dot pattern layer formed on a surface of the porous coating layer and having a plurality of dots made of polymer and arranged at predetermined intervals. The separator may control short-circuit between positive and negative electrodes though an electrochemical device is overheated. Also, a united force to an electrode is enhanced due to the polymer dot pattern layer, thereby preventing the electrode and the separator from being separated. Accordingly, inorganic particles of the porous coating layer formed on the porous substrate are not separated, thereby improving stability of an electrochemical device. | 12-23-2010 |
20110049734 | Method for Preparing Sintered Annular Nuclear Fuel Pellet - A method for fabricating a sintered annular nuclear fuel pellet includes molding nuclear fuel powder or granule, an oxide of a fissile element (M), to fabricate an annular nuclear fuel green body. A rod-like shaped structure is inserted into the annular nuclear fuel green body and sintered in a slight oxidizing gas atmosphere such that the oxide of the fissile element has a balanced O/M ratio higher than a desired O/M ratio (oxygen/fissile element) of a final sintered annular nuclear fuel pellet, while being maintained in a cubic phase. The sintered annular nuclear fuel pellet is then reduced in a reductive gas atmosphere so as to have the desired O/M ratio in the state that the rod-like shaped structure is inserted. | 03-03-2011 |
20110121473 | Method for Fabricating Sintered Annular Nuclear Fuel Pellet Through Rod-Inserted Sintering - A method for fabricating a sintered annular nuclear fuel pellet includes: molding nuclear fuel powder or granules to fabricate an annular nuclear fuel green body; inserting a rod-like shaped structure into the annular nuclear fuel green body; sintering the rod-like shaped structure-inserted annular nuclear fuel green body in a reductive gas atmosphere; and separating the sintered annular nuclear fuel pellet from the rod-like shaped structure. | 05-26-2011 |
20110142454 | OPTICAL TRANSMISSION AND RECEPTION CONTROL APPARATUS - An optical transmission and reception control apparatus is provided. The present invention relates to an optical transmission and reception control apparatus for enabling smooth optical transmission and reception when a photo diode and/or a laser diode fail. The apparatus includes a plurality of laser diodes, a laser driver, a first switching unit, a plurality of photo diodes, an optical power amplifier, a second switching unit, an optical power detection module, and a control module. | 06-16-2011 |
20110195294 | METHOD FOR MANUFACTURING SEPARATORS, SEPARATORS MANUFACTURED BY THE METHOD AND ELECTROCHEMICAL DEVICES INCLUDING THE SEPARATORS - A method for manufacturing separators includes (S | 08-11-2011 |
20110256443 | SEPARATOR INCLUDING POROUS COATING LAYER AND ELECTROCHEMICAL DEVICE INCLUDING THE SAME - Disclosed is a separator. The separator includes a planar non-woven fabric substrate having a plurality of pores, and a porous coating layer formed on at least one surface of the non-woven fabric substrate. The porous coating layer is composed of a mixture of filler particles and a binder polymer. The filler particles include conductive positive temperature coefficient (PTC) particles composed of a mixture of conductive particles and a low melting point resin having a melting point lower than that of the non-woven fabric substrate. Due to the presence of the conductive PTC particles, the porous coating layer can be imparted with a shutdown function against thermal runaway. In addition, the porous coating layer exhibits appropriate electrical conductivity. Therefore, the separator is suitable for use in a high-capacity electrochemical device. | 10-20-2011 |
20110259505 | METHOD FOR MANUFACTURING SEPARATOR, SEPARATOR MANUFACTURED THEREFROM AND METHOD FOR MANUFACTURING ELECTROCHEMICAL DEVICE HAVING THE SAME - Disclosed is a method for manufacturing a separator for an electrochemical device. The method contributes to formation of a separator with good bondability to electrodes and prevents inorganic particles from detaching during an assembling process of an electrochemical device. | 10-27-2011 |
20110305941 | Separator Having Porous Coating Layer, Manufacturing Method Of The Same, And Electrochemical Device Having The Same - A separator includes a planar non-woven fabric substrate having a plurality of pores, and a porous coating layer provided on at least one surface of the non-woven fabric substrate and made of a mixture of a plurality of inorganic particles and a binder polymer, wherein the non-woven fabric substrate is made of superfine fibers having an average thickness of 0.5 to 10 μm, and wherein, among the pores in the non-woven fabric substrate, pores having a wide diameter of 0.1 to 70 μm are 50% or above of the entire pores. The above separator having the porous coating layer may generate the generation of leak current without increasing a loading weight of the porous coating layer since the non-woven fabric substrate having a controlled pore side by using superfine fibers of a predetermined thickness is used. | 12-15-2011 |
20120003545 | METHOD FOR MANUFACTURING ELECTRODE HAVING POROUS COATING LAYER, ELECTRODE MANUFACTURED THEREFROM, AND ELECTROCHEMICAL DEVICE COMPRISING THE SAME - A method for manufacturing an electrode may include (S1) preparing a sol solution containing a metal alkoxide compound, and (S2) forming a porous non-woven coating layer of an inorganic fiber by electroemitting the sol solution onto an outer surface of an electrode active material layer formed on at least one surface of a current collector. The porous non-woven coating layer formed on the outer surface of the electrode active material layer may be made from an inorganic fiber having excellent thermal stability. When an electrochemical device is overheated, the porous non-woven coating layer may contribute to suppression of a short circuit between a cathode and an anode and performance improvement of an electrochemical device due to uniform distribution of pores. | 01-05-2012 |
20120009331 | Method For Manufacturing Cable-Type Secondary Battery - The present invention relates to a method for manufacturing a cable-type secondary battery comprising an electrode that extends longitudinally in a parallel arrangement and that includes a current collector having a horizontal cross section of a predetermined shape and an active material layer formed on the current collector, and the electrode is formed by putting an electrode slurry including an active material, a polymer binder, and a solvent into an extruder, by extrusion-coating the electrode slurry on the current collector while continuously providing the current collector to the extruder, and by drying the current collector coated with the electrode slurry to form an active material layer. | 01-12-2012 |
20120015228 | SEPARATOR INCLUDING POROUS COATING LAYER, METHOD FOR MANUFACTURING THE SEPARATOR AND ELECTROCHEMICAL DEVICE INCLUDING THE SEPARATOR - A separator includes a non-woven fabric substrate having pores, fine thermoplastic powder located inside the pores of the non-woven fabric substrate, and a porous coating layer disposed on at least one surface of the non-woven fabric substrate. The fine thermoplastic powder has an average diameter smaller than that of the pores and a melting point lower than the melting or decomposition point of the non-woven fabric substrate. The porous coating layer includes a mixture of inorganic particles and a binder polymer whose melting point is higher than the melting or decomposition point of the fine thermoplastic powder. In the porous coating layer, the inorganic particles are fixedly connected to each other by the binder polymer and the pores are formed by interstitial volumes between the inorganic particles. Previous filling of the large pores of the non-woven fabric substrate with the fine thermoplastic powder makes the porous coating layer uniform. | 01-19-2012 |
20120015254 | Method For Manufacturing Separator Including Porous Coating Layers, Separator Manufactured By The Method And Electrochemical Device Including The Separator - Disclosed is a method for manufacturing a separator. The method includes (S1) preparing a slurry containing inorganic particles dispersed therein and a solution of a binder polymer in a solvent, and coating the slurry on at least one surface of a porous substrate to form a first porous coating layer, and (S2) electroprocessing a polymer solution on the outer surface of the first porous coating layer to form a second porous coating layer. The first porous coating layer formed on at least one surface of the porous substrate is composed of a highly thermally stable inorganic material to suppress short-circuiting between an anode and a cathode even when an electrochemical device is overheated. The second porous coating layer formed by electroprocessing improves the bindability of the separator to other base materials of the electrodes. | 01-19-2012 |
20120088144 | SEPARATOR HAVING POROUS COATING LAYER AND ELECTROCHEMICAL DEVICE CONTAINING THE SAME - A separator includes a porous substrate having a plurality of pores, and a porous coating layer formed on at least one surface of the porous substrate and made of a mixture of a plurality of filler particles and a binder polymer. The filler particles include electrode active material particles that are electrochemically oxidized and reduced. The binder polymer includes a copolymer having (a) a first monomer unit with a contact angle to water of 0 to 49° and (b) a second monomer unit with a contact angle to water of 50 to 130°. This separator is useful for an electrochemical device, particularly a lithium secondary battery. This separator ensures improved thermal stability and increased capacity of the electrochemical device. Also, inorganic particles in the porous coating layer formed on the porous substrate are not disintercalated due to excellent peeling resistance of the porous coating layer while the electrochemical is assembled. | 04-12-2012 |
20120090758 | Method For Manufacturing Separator, Separator Manufactured By The Method And Method For Manufacturing Electrochemical Device Including The Separator - Disclosed is a method for manufacturing a separator. The method includes (S1) preparing a porous planar substrate having a plurality of pores, (S2) preparing a slurry containing inorganic particles dispersed therein and a polymer solution including a first binder polymer and a second binder polymer in a solvent, and sequentially coating the slurry on the porous substrate through a first discharge hole and a non-solvent incapable of dissolving the second binder polymer on the slurry through a second discharge hole adjacent to the first discharge hole, and (S3) simultaneously removing the solvent and the non-solvent by drying. According to the method, a separator with good bindability to electrodes can be manufactured in an easy manner. In addition, problems associated with the separation of inorganic particles in the course of manufacturing an electrochemical device can be avoided. | 04-19-2012 |
20120098149 | METHOD OF CONTROLLING SOLUBILITY OF ADDITIVES AT AND NEAR GRAIN BOUNDARIES, AND METHOD OF MANUFACTURING SINTERED NUCLEAR FUEL PELLET HAVING LARGE GRAIN SIZE USING THE SAME - Provided are a method of controlling the compositional gradient and solubility of doped-additives at grain boundaries during sintering of a uranium-based oxide green pellet including the additives, and a method of manufacturing a sintered nuclear fuel pellet having a large grain size using the same. The grain boundary solubility of the doped-additives is maintained at a certain level by stepwise varying of an oxygen partial pressure during isothermal sintering of a uranium-based oxide green pellet including the additives. The method of manufacturing a sintered nuclear fuel pellet having a large grain size includes preparing additive mixed uranium oxide powder, forming an additive mixed uranium oxide green pellet using the mixed powder, heating the green pellet to a sintering temperature in a gas atmosphere having a low oxygen partial pressure, and sintering while a sintering gas atmosphere is changed to stepwise increase an oxygen partial pressure at the isothermal sintering temperature. | 04-26-2012 |
20120115036 | Method For Manufacturing Separator, Separator Manufactured By The Method And Method For Manufacturing Electrochemical Device Including The Separator - Disclosed is a method for manufacturing a separator. The method includes (S | 05-10-2012 |
20120244292 | METHOD FOR MANUFACTURING ELECTRODE HAVING POROUS COATING LAYER, ELECTRODE MANUFACTURED THEREFROM, AND ELECTROCHEMICAL DEVICE COMPRISING THE SAME - A method for manufacturing an electrode may include (S1) preparing a sol solution containing a metal alkoxide compound, and (S2) forming a porous non-woven coating layer of an inorganic fiber by electroemitting the sol solution onto an outer surface of an electrode active material layer formed on at least one surface of a current collector. The porous non-woven coating layer formed on the outer surface of the electrode active material layer may be made from an inorganic fiber having excellent thermal stability. When an electrochemical device is overheated, the porous non-woven coating layer may contribute to suppression of a short circuit between a cathode and an anode and performance improvement of an electrochemical device due to uniform distribution of pores. | 09-27-2012 |
20120251869 | ELECTROCHEMICAL DEVICE WITH IMPROVED CYCLE CHARACTERISTICS - Disclosed is an electrochemical device. The electrochemical device includes: (a) a composite separator including a porous substrate, a first porous coating layer coated on one surface of the porous substrate, and a second porous coating layer coated on the other surface of the porous substrate; (b) an anode disposed to face the first porous coating layer; and (c) a cathode disposed to face the second porous coating layer. The first and second porous coating layers are each independently composed of a mixture including inorganic particles and a binder polymer. The first porous coating layer is thicker than the second porous coating layer. The electrochemical device has good thermal stability and improved cycle characteristics. | 10-04-2012 |
20130004817 | ELECTRODE ASSEMBLY AND METHOD FOR CONSTRUCTING THE SAME - A jelly-roll type electrode assembly is disclosed. The jelly-roll type electrode assembly includes an anode, a cathode, and separators interposed between the anode and the cathode and having a greater length than width. Each of the separators is longer than the anode and the cathode. Each of the separators has a porous substrate and porous coating layers formed on both surfaces of the porous substrate. The porous coating layers include a mixture of inorganic particles and a binder polymer. The porous coating layers are formed only in areas where the separators are in contact with the anode and the cathode. The porous coating layers enhance the heat resistance of the separators. Due to the enhanced heat resistance, the separators can prevent the performance of a battery from deteriorating. In addition, the porous coating layers can be prevented from being separated from the separators during battery assembly processing. | 01-03-2013 |
20130011715 | ELECTRODE ASSEMBLY FOR ELECTROCHEMICAL DEVICE AND ELECTROCHEMICAL DEVICE INCLUDING THE SAME - Disclosed is an electrode assembly having a structure in which a plurality of unit cells are bonded to one or both surfaces of a first separator whose length is greater than width and are stacked in a zigzag pattern or wound sequentially. The first separator includes a first porous electrode adhesive layer, to which electrodes of the unit cells are adhered, formed at one surface thereof to which the unit cells are bonded. The first porous electrode adhesive layer includes a mixture of inorganic particles and a binder polymer. Each of the unit cells includes a second separator including second porous electrode adhesive layers, to which electrodes of the unit cell are adhered, formed at both surfaces thereof. Each of the second porous electrode adhesive layers includes a mixture of inorganic particles and a binder polymer. Further disclosed is an electrochemical device including the electrode assembly. | 01-10-2013 |
20130017429 | Separator And Electrochemical Device Comprising The Same - A separator may include (A) a porous substrate having pores, and (B) a porous coating layer formed on at least one surface of the porous substrate and made from a mixture of inorganic particles and a binder polymer, and the binder polymer may contain a copolymer of (a) a first monomer unit with at least one of an amine group and an amide group at a side chain, and (b) a second monomer unit of (meth)acrylate with an alkyl group having 1 to 14 carbon atoms. The porous coating layer of the separator may have a high packing density, thereby easily forming a thin film battery without hindering safety, and may have good adhesive strength with the porous substrate, thereby preventing detachment of the inorganic particles in the porous coating layer during assembly of an electrochemical device. | 01-17-2013 |
20130084483 | SEPARATOR AND ELECTROCHEMICAL DEVICE COMPRISING THE SAME - Disclosed is a separator. The separator includes a porous substrate, and a porous coating layer formed on at least one surface of the porous substrate and including a mixture of inorganic particles and a binder polymer. A continuous or discontinuous patterned layer is formed on the surface of the porous coating layer to allow an electrolyte solution to permeate therethrough. The continuous or discontinuous patterned layer may be formed with continuous grooves to allow an electrolyte solution to permeate therethrough. Due to this structure, the wettability of the separator with an electrolyte solution is improved, shortening the time needed to impregnate the electrolyte solution into the separator. | 04-04-2013 |
20130101885 | METHOD FOR MANUFACTURING SEPARATOR, SEPARATOR MANUFACTURED BY THE METHOD AND METHOD FOR MANUFACTURING ELECTROCHEMICAL DEVICE INCLUDING THE SEPARATOR - A method for manufacturing a separator includes (S | 04-25-2013 |
20130149587 | Separator Having Porous Coating Layer And Electrochemical Device Having The Same - The present invention relates to a separator comprising a porous substrate; and a porous coating layer formed on at least one surface of the porous substrate and comprising a mixture of first inorganic particles coated with a coupling agent on the surface thereof, second inorganic particles coated with a coupling agent on the surface thereof and a binder polymer, the first inorganic particles having an average diameter of 1 to 10 μm and the second inorganic particles having an average diameter of 50 to 500 nm. In accordance with the present invention, a separator having a porous coating layer comprising two kinds of inorganic particles which are coated with a coupling agent is manufactured to minimize a mechanochemical reaction, thereby inhibiting the production of unnecessary substances, and to easily introduce functional particles. | 06-13-2013 |
20130223582 | FABRICATION METHOD OF BURNABLE ABSORBER NUCLEAR FUEL PELLETS AND BURNABLE ABSORBER NUCLEAR FUEL PELLETS FABRICATED BY THE SAME - A fabrication method of burnable absorber nuclear fuel pellets and burnable absorber nuclear fuel pellets fabricated by the same are provided, in which the fabrication method includes adding boron compound and manganese compound to one or more type of nuclear fuel powders selected from the group consisting of uranium dioxide (UO | 08-29-2013 |
20130240805 | Uranium Dioxide Nuclear Fuel Containing Mn and Al as Additives and Method of Fabricating the Same | 09-19-2013 |
20130244082 | Separator, Manufacturing Method Of The Same, And Electrochemical Device Having The Same - The separator of the present invention comprises a porous composite having a porous substrate and a first porous coating layer formed on at least one surface of the porous substrate and comprising a mixture of inorganic particles and a first binder polymer; and a second porous coating layer formed on a first surface of the porous composite and comprising a mixture of cathode active material particles, a second binder polymer and a first conductive material, a third porous coating layer formed on a second surface of the porous composite and comprising a mixture of anode active material particles, a third binder polymer and a second conductive material, or both of the second porous coating layer and the third porous coating layer. Also, the separator of present invention may further comprise a fourth porous coating layer formed on at least one outermost surface thereof and comprising a fourth binder polymer. | 09-19-2013 |
20130260208 | SEPARATOR AND ELECTROCHEMICAL DEVICE HAVING THE SAME - The present invention provides a separator having a porous substrate; and a porous coating layer formed on one surface of the porous substrate and comprising a mixture of inorganic particles and a binder polymer, which has a value of a porosity×an air permeability per thickness in the range of 5 to 40, the porosity and the air permeability per thickness. The separator having a porous coating layer according to the present invention has a porosity which is controlled depending on the air permeability of the porous substrate, and thus exhibit superior ionic conductivity as well as good mechanical properties, thereby contributing to improve the performance and safety of an electrochemical device. | 10-03-2013 |
20130280583 | SEPARATOR AND ELECTROCHEMICAL DEVICE HAVING THE SAME - The present invention refers to a separator for an electrochemical device and an electrochemical device having the same. More specifically, the separator of the present invention comprises a porous substrate; a first porous coating layer formed on one surface of the porous substrate and comprising a mixture of inorganic particles and a first binder polymer; and a second porous coating layer formed on the other surface of the porous substrate and comprising a product obtained by drying a mixture of a solvent, a non-solvent and a second binder polymer. | 10-24-2013 |
20130316219 | METHOD FOR MANUFACTURING SEPARATOR, SEPARATOR MANUFACTURED THEREFROM, AND ELECTROCHEMICAL DEVICE COMPRISING THE SAME - The present invention provides a method for manufacturing a separator, comprising the steps of (S1) preparing a porous planar substrate having multiple pores; (S2) coating a coating solution obtained by dissolving a binder polymer in a solvent and dispersing inoganic particles therein on the porous substrate to form a porous coating layer and drying the porous coating layer; and (S3) applying a binder solution on the surface of the dried porous coating layer to form an adhesive layer, wherein the binder solution has a surface energy of at least 10 mN/m higher than that of the porous coating layer and a contact angle of the binder solution to the surface of the porous coating layer maintained at 80° or more for 30 seconds. In accordance with the present invention, a separator capable of obtaining sufficient adhesion force with minimizing the amount of an adhesive used for the adhesion with an electrode, and minimizing the deterioration of battery performances can be easily manufactured. | 11-28-2013 |
20140023921 | ELECTRODE HAVING POROUS COATING LAYER, MANUFACTURING METHOD THEREOF AND ELECTROCHEMICAL DEVICE CONTAINING THE SAME - The present invention provides an electrode comprising a current collector; an electrode active material layer formed on at least one surface of the current collector and comprising a mixture of electrode active material particles and a first binder polymer; and a porous coating layer formed on the surface of the electrode active material layer, comprising a mixture of inorganic particles and a second binder polymer and having a thickness deviation defined by the following Formula ( | 01-23-2014 |
20140101931 | METHOD FOR MANUFACTURING SEPARATOR, SEPARATOR MANUFACTURED THEREFROM AND METHOD FOR MANUFACTURING ELECTROCHEMICAL DEVICE HAVING THE SAME - Disclosed is a method for manufacturing a separator for an electrochemical device. The method contributes to formation of a separator with good bondability to electrodes and prevents inorganic particles from detaching during an assembling process of an electrochemical device. | 04-17-2014 |
20140120402 | SEPARATOR COMPRISING MICROCAPSULES AND ELECTROCHEMICAL DEVICE HAVING THE SAME - The present invention refers to a separator, comprising a porous substrate having multiple pores; a porous coating layer formed on at least one area selected from at least one surface of the porous substrate and the pores of the porous substrate, and comprising multiple inorganic particles and a binder polymer, the binder polymer being existed on a part or all of the surface of the inorganic particles to connect and immobilize the inorganic particles therebetween; and microcapsules dispersed in at least one area selected from the pores of the porous substrate and pores formed by vacant spaces between the inorganic particles present in the porous coating layer, and containing therein an additive for improving the performances of an electrochemical device, and an electrochemical device having the same. | 05-01-2014 |
20140178740 | SEPARATOR AND ELECTROCHEMICAL DEVICE HAVING THE SAME - The present invention refers to a method of preparing a separator, a separator prepared therefrom and an electrochemical device having the separator. The method of preparing a separator according to the present invention comprises providing a planar and porous substrate having multiple pores; and coating a first slurry on at least one surface of the porous substrate through a slot section to form a porous coating layer, while continuously coating a second slurry on the porous coating layer through a slide section adjacent to the slot section to form a layer for adhesion with an electrode, the first slurry comprising inorganic particles, a first binder polymer and a first solvent, and the second slurry comprising a second binder polymer and a second solvent. | 06-26-2014 |
20140185730 | URANIUM DIOXIDE NUCLEAR FUEL PELLET HAVING CERAMIC MICROCELLS AND FABRICATING METHOD THEREOF - A uranium dioxide nuclear fuel pellet has about 50 to about 400 μM (with respect to a 3-dimentional size) microcells formed of a ceramic material having a chemical attraction with fission products generated in the nuclear fuel pellet to absorb and trap the fission products, such that the extraction of the fission product may be retrained in a normal operation condition and that the performance of the nuclear fuel may be enhanced by mitigating PCI. In addition, highly radioactive fission products including Cs and I having a large generation amount or a long half-life enough to affect the environments can be trapped in the pellet in an accident condition, without being released outside. | 07-03-2014 |
20140185731 | URANIUM DIOXIDE NUCLEAR FUEL PELLET HAVING METALLIC MICROCELLS AND FABRICATING METHOD THEREOF - A uranium dioxide nuclear fuel pellet includes metallic microcells having a high protection capacity for fission products and a high thermal conductivity simultaneously arranged in the nuclear fuel pellet to trap fission products, such that extraction of fission products may be restrained in a normal operation condition and that the temperature of a nuclear fuel may be lowered to enhance the performance of the nuclear fuel, only to restrain extraction of radioactive fission products toward the environment in an accident condition to enhance a stability of the nuclear fuel pellet, and a fabricating method thereof. | 07-03-2014 |
20140186681 | ELECTROCHEMICAL DEVICE WITH IMPROVED CYCLE CHARACTERISTICS - Disclosed is an electrochemical device. The electrochemical device includes: (a) a composite separator including a porous substrate, a first porous coating layer coated on one surface of the porous substrate, and a second porous coating layer coated on the other surface of the porous substrate; (b) an anode disposed to face the first porous coating layer; and (c) a cathode disposed to face the second porous coating layer. The first and second porous coating layers are each independently composed of a mixture including inorganic particles and a binder polymer. The first porous coating layer is thicker than the second porous coating layer. The electrochemical device has good thermal stability and improved cycle characteristics. | 07-03-2014 |
20140220411 | SEPARATOR FOR ELECTROCHEMICAL DEVICE AND ELECTROCHEMICAL DEVICE INCLUDING THE SEPARATOR - Disclosed is a method for manufacturing a separator. The method includes (S1) preparing a porous planar substrate having a plurality of pores, (S2) preparing a slurry containing inorganic particles dispersed therein and a polymer solution including a first binder polymer and a second binder polymer in a solvent, and coating the slurry on at least one surface of the porous substrate, (S3) spraying a non-solvent incapable of dissolving the second binder polymer on the slurry, and (S4) simultaneously removing the solvent and the non-solvent by drying. According to the method, a separator with good bindability to electrodes can be manufactured in an easy manner. In addition, problems associated with the separation of inorganic particles in the course of manufacturing an electrochemical device can be avoided. | 08-07-2014 |
20140255741 | ELECTRODE FOR SECONDARY BATTERY, SECONDARY BATTERY AND CABLE-TYPE SECONDARY BATTERY COMPRISING THE SAME - The present invention provides an electrode for a secondary battery, more specifically an electrode for a secondary battery, comprising a current collector; an electrode active material layer formed on at least one surface or the whole outer surface of the current collector; a conductive material-coating layer formed on the top surface of the electrode active material layer and comprising a conductive material and a first polymer binder; and a porous coating layer formed on the top surface of the conductive material-coating layer and comprising a second polymer binder. Also, the present invention provides a secondary battery and a cable-type secondary battery comprising the electrode | 09-11-2014 |
20140255742 | ELECTRODE FOR SECONDARY BATTERY, SECONDARY BATTERY AND CABLE-TYPE SECONDARY BATTERY COMPRISING THE SAME - The present invention provides an electrode for a secondary battery, more specifically an electrode for a secondary battery, comprising a current collector; an electrode active material layer formed on at least one surface or the whole outer surface of the current collector; a graphite-based coating layer formed on the top surface of the electrode active material layer and comprising graphite, a conductive material and a first polymer binder; and a porous coating layer formed on the top surface of the graphite-based coating layer and comprising a second polymer binder. Also, the present invention provides a secondary battery and a cable-type secondary battery comprising the electrode. | 09-11-2014 |
20140255751 | ELECTRODE FOR ELECTROCHEMICAL DEVICE AND ELECTROCHEMICAL DEVICE COMPRISING THE SAME - The present invention provides an electrode for an electrochemical device comprising: an electrode current collector; an electrode active material layer formed on a part of at least one surface of the electrode current collector, and comprising an electrode active material; a packed bed formed on non-coating areas of both sides of the electrode current collector, on which the electrode active material layer is not formed, coated to be continuous with the electrode active material layer, and comprising a mixture of a first inorganic particles and a first polymer binder; and a separation layer formed simultaneously on the surfaces of the electrode active material layer and the packed bed, and comprising a mixture of a second inorganic particles and a second polymer binder. | 09-11-2014 |
20140272525 | NON-WOVEN FABRIC MADE FROM FIBER COATED WITH ORGANIC BINDER POLYMER COMPOUND, ELECTROCHEMICAL CELL COMPRISING THE NON-WOVEN FABRIC, AND METHOD FOR MAKING THE NON-WOVEN FABRIC - The present disclosure relates to a non-woven fabric made from a fiber coated with a binder polymer by spinning a non-woven forming fiber in an organic binder polymer compound solution, an electrochemical cell using the non-woven fabric as a separator substrate, and a method of making the non-woven fabric, and the non-woven fabric has a pore diameter in a range of 0.001 to 10 μm, thereby providing a mechanical property required for a separator while ensuring a favorable movement of a lithium ion, and in the use of the non-woven fabric as a separator of an electrochemical cell, eliminating a need for a process of applying a separate adhesive layer, resulting in an effect of simplifying a separator manufacturing process. | 09-18-2014 |
20140287294 | METHOD OF PREPARING SEPARATOR FOR LITHIUM SECONDARY BATTERY, SEPARATOR PREPARED THEREFROM, AND LITHIUM SECONDARY BATTERY COMPRISING THE SAME - The present invention provides a method of preparing a separator for a lithium secondary battery, comprising: forming a porous coating layer on at least one surface of a porous substrate, the porous coating layer comprising inorganic particles; bringing polymer particles into electric charging to obtain electrically charged polymer particles; transferring the electrically charged polymer particles on the top surface the porous coating layer to form a functional coating layer; and fixing the functional coating layer with heat and pressure, a separator prepared by the method, and a lithium secondary battery comprising the separator. | 09-25-2014 |
20140287296 | SEPARATOR AND ELECTROCHEMICAL DEVICE HAVING THE SAME - The present invention refers to a separator and an electrochemical device having the same. The separator of the present invention comprises a non-woven fabric substrate obtained from fibers and having multiple pores formed between the fibers; and a polymer coating layer formed on a part or the whole of the surface of the fibers, wherein the polymer coating layer comprises a polymer having a tensile strength of 80 MPa or more, a tensile modulus of 3,000 MPa or more and a flexural modulus of 3,000 MPa or more. | 09-25-2014 |
20140287327 | METHOD OF COATING SUBSTRATE FOR LITHIUM SECONDARY BATTERY WITH INORGANIC PARTICLES AND LITHIUM SECONDARY BATTERY COMPRISING SUBSTRATE COATED BY THE METHOD - The present invention provides a method of coating a substrate for a lithium secondary battery with inorganic particles, comprising charging the inorganic particles to form charged inorganic particles; transferring the charged inorganic particles on the substrate for a lithium secondary battery to form a coating layer; and fixing the coating layer with heat and pressure. Such a coating method according to one embodiment of the present invention uses electrostatic force without the addition of a solvent, and therefore, non use of a solvent can result in cost-reducing effects since there is no burden on the handling and storing of the solvent, and since a drying procedure after slurry coating is not needed, it allows for the preparation of a lithium secondary battery in a highly effective and rapid manner. | 09-25-2014 |
20140295285 | METHOD OF PREPARING SEPARATOR, SEPARATOR PREPARED THEREFROM, AND ELECTROCHEMICAL DEVICE HAVING THE SAME - The present invention refers to a method of preparing a separator, comprising: producing a dispersion comprising inorganic particles, a polymer binder, polymer fibers and a solvent; applying the dispersion on the top surface of a substrate to form a non-woven fabric web as a layer comprising the inorganic particles, the polymer binder and the polymer fiber, in which the inorganic particles are positioned in gaps of the polymer fibers and adhered thereto by the polymer binder; and drying and compressing the non-woven fabric web to obtain a non-woven fabric substrate; a separator prepared by the method; and an electrochemical device comprising the separator. | 10-02-2014 |
20140301693 | Optical Modulator Using Waveguides - In accordance with an optical modulator using waveguides of the present invention, the reflection phenomenon of light is used, so that the optical modulator is neither sensitive to the wavelength, mode, polarization, intensity, beam size, etc. of light, nor sensitive to the temperature, the waveguide size, the uniformity of a refractive index, carrier doping concentration, changes in control voltage/current, etc., thus obtaining stable optical modulation characteristics. An optical modulator using waveguides includes a first waveguide ( | 10-09-2014 |
20140307998 | Optical Path-Changing Device Having Curved Waveguide - In accordance with the present invention, there is provided an optical path-changing device having one or more curved waveguides, which not only can change an optical path at a large angle close to a perpendicular direction after light or an optical signal has been incident and reflected, but also can change the optical path in various directions, such as for straight pass, left turn, and right turn. An optical path-changing device having one or more curved waveguides according to an embodiment of the present invention includes a first waveguide ( | 10-16-2014 |
20140322586 | SEPARATOR FOR SECONDARY BATTERY COMPRISING DUAL POROUS COATING LAYER OF INORGANIC PARTICLES WITH DIFFERENT SURFACE CHARACTERISTICS, SECONDARY BATTERY COMPRISING THE SAME, AND METHOD OF MANUFACTURING THE SEPARATOR - The present disclosure relates to a separator for a secondary battery including a dual porous coating layer of inorganic particles with different surface characteristics, a secondary battery including the same, and a method of manufacturing the separator. According to an exemplary embodiment of the present disclosure, a separator including a porous substrate, a first porous coating layer, and a second porous coating layer is provided. According to the present disclosure, a method of manufacturing a separator including forming a first slurry, forming a second slurry, forming a first porous coating layer, and forming a second porous coating layer is provided. A separator according to the present disclosure has uniform dispersion of inorganic particles in a coating layer of the separator, and adsorbs an excess of metal ions generated in the battery when the battery is out of a normal operating temperature range, thereby ensuring safety of the battery. | 10-30-2014 |
20140331923 | SLOT DIE WITH IMPROVED CHAMBER STRUCTURE AND COATING APPARATUS HAVING THE SAME - Disclosed is a slot die, which includes a feed unit for introducing a coating material, a chamber for accommodating a coating material supplied through the feed unit, a slit communicating with the chamber to discharge the coating material, and a die body having die lips which form the slit, wherein the chamber includes a chamber block which has an inner space for accommodating the coating material and is configured so that the entire block is exchangeable with respect to the die body, and wherein a coating width is determined by a width of the inner space of the chamber block. | 11-13-2014 |
20140342237 | SEPARATOR FOR ELECTROCHEMICAL DEVICE AND MANUFACTURING METHOD THEREOF - Disclosed are a separator for an electrochemical device substantially comprising inorganic particles to provide an excellent mechanical strength, an electrochemical device comprising the same, and a method of manufacturing the separator using a high internal phase emulsion (RIPE). | 11-20-2014 |
20140342238 | METHOD OF MANUFACTURING POROUS SEPARATOR COMPRISING ELASTIC MATERIAL, POROUS SEPARATOR MANUFACTURED BY THE METHOD, AND SECONDARY BATTERY COMPRISING THE SEPARATOR - Disclosed is a method of manufacturing a porous separator including an elastic material, and a separator manufactured by the method. The separator includes an elastic material being uniformly dispersed in a polymer at a weight ratio of 40:60 to 5:95, and a value of elongation at break in a low tensile strength direction at room temperature is greater than or equal to 250%. In addition, the method of manufacturing a porous separator includes forming an extruded sheet by extruding a mixture of a polymer and an elastic material at a weight ratio of 95:5 to 60:40, forming a film by annealing and stretching the extruded sheet, and forming a porous separator by heat setting the stretched film. Accordingly, a thermal shrinkage ratio of the film is reduced and an elongation at break is greatly increased, to provide a porous separator with improved stability. | 11-20-2014 |
20140377452 | METHOD FOR MANUFACTURING CABLE-TYPE SECONDARY BATTERY - The present invention relates to a method for manufacturing a cable-type secondary battery comprising an electrode that extends longitudinally in a parallel arrangement and that includes a current collector having a horizontal cross section of a predetermined shape and an active material layer formed on the current collector, and the electrode is formed by putting an electrode slurry including an active material, a polymer binder, and a solvent into an extruder, by extrusion-coating the electrode slurry on the current collector while continuously providing the current collector to the extruder, and by drying the current collector coated with the electrode slurry to form an active material layer. | 12-25-2014 |
20150017507 | CONNECTING ELEMENT FOR SECONDARY BATTERY AND SECONDARY BATTERY COMPRISING THE SAME - A connecting element for a secondary battery according to the present disclosure includes a metal plate having a recess groove, a soldering pattern having a lower melting point than the metal plate and formed within the recess groove, and an insulation layer formed on at least one surface among both surfaces of the metal plate, and covering an area where the soldering pattern is formed. | 01-15-2015 |
20150034249 | APPARATUS FOR PREPARING ELECTRODE ASSEMBLY - The present disclosure provides an apparatus for preparing an electrode assembly, comprising a printing unit including a charging mean for bringing polymer particles into electric charging to obtain electrically charged polymer particles, and a transferring mean for coating the electrically charged polymer particles by way of transferring on at least one surface of a substrate for an electrochemical device to form an adhesive layer on the substrate, the substrate being at least one of a cathode, an anode and a separator; and a laminating unit that applies heat and pressure to the substrate having the adhesive layer formed thereon so as to obtain the electrode assembly comprising the cathode, the anode and the separator interposed therebetween. | 02-05-2015 |
20150044528 | OVERCURRENT SHUT-OFF DEVICE AND SECONDARY BATTERY SYSTEM COMPRISING THE SAME - An overcurrent shut-off device according to an exemplary embodiment of the present disclosure includes a switching unit connected to both ends of a secondary battery, the switching unit being turned on by pressure caused by a swelling phenomenon occurring in the secondary battery, and a fusing unit, as a component installed on a path of an electric current flowing through the secondary battery, being ruptured when the switching unit is turned on, to interrupt the electric current flowing through the secondary battery. | 02-12-2015 |
20150086714 | SEPARATOR HAVING POROUS COATING LAYER AND ELECTROCHEMICAL DEVICE HAVING THE SAME - The present invention refers to a method for manufacturing a separator, comprising preparing first inorganic particles having an average diameter of 1 to 10 μm and coated with a coupling agent, and second inorganic particles having an average diameter of 50 to 500 nm and coated with a coupling agent on the surface thereof; mixing the first inorganic particles and the second inorganic particles together with a binder polymer and adding the resulting mixture to a solvent to obtain a slurry; and coating the slurry on at least one surface of a porous substrate. | 03-26-2015 |