| Patent application number | Description | Published |
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| 20080292968 | Organic/Inorganic Composite Separator Having Morphology Gradient, Manufacturing Method Thereof and Electrochemical Device Containing the Same - Disclosed is an organic/inorganic composite separator including: a porous substrate having pores; and a porous active layer containing a mixture of inorganic particles and a binder polymer with which at least one surface of the porous substrate is coated. The organic/inorganic composite separator of the present invention may be useful to enhance peeling and scratch resistances and improve a lamination characteristic by introducing a porous active layer onto a porous substrate having pores, the porous active layer having heterogeneity of morphology toward a thickness direction in which a content ratio of the binder polymer/inorganic particles present in a surface layer is higher than that of the binder polymer/inorganic particles present inside the surface layer. Accordingly, the stability and performances of a battery can be improved together since the detachment of inorganic particles from the porous active layer may be reduced during the assembly process of the electrochemical device. | 11-27-2008 |
| 20080311479 | Electrode With Enhanced Safety and Electrochemical Device Having the Same - Disclosed is an electrode having a current collector coated with an electrode active material, wherein non-coated regions of the electrode and boundary regions of intermittently pattern-coated electrodes are coated with a porous active layer including a mixture of inorganic particles and a binder polymer. The electrode of the present invention may be useful to improve safety of a battery and also minimize reduction in the capacity of a battery by introducing the porous active layer onto non-coated regions of the electrode and/or boundary regions of the intermittently pattern-coated electrodes to prevent internal short circuit caused by the contact between both electrodes, wherein the boundary regions are coated with the electrode active material but vulnerable to the electrical short circuit. | 12-18-2008 |
| 20090111025 | ORGANIC/INORGANIC COMPOSITE MICROPOROUS MEMBRANE AND ELECTROCHEMICAL DEVICE PREPARED THEREBY - Disclosed is an organic/inorganic composite porous separator comprising: (a) a polyolefin-based separator substrate; and (b) an active layer formed by coating at least one region selected from the group consisting of a surface of the substrate and a part of pores present in the substrate with a mixture of inorganic particles and a binder polymer, wherein the inorganic particles in the active layer are interconnected among themselves and are fixed by the binder polymer, and interstitial volumes among the inorganic particles form a pore structure. A method for manufacturing the same separator and an electrochemical device including the same separator are also disclosed. An electrochemical device comprising the organic/inorganic composite porous separator shows improved thermal and electrochemical safety and quality, simultaneously. | 04-30-2009 |
| 20090111026 | ORGANIC/INORGANIC COMPOSITE SEPARATOR HAVING POROUS ACTIVE COATING LAYER AND ELECTROCHEMICAL DEVICE CONTAINING THE SAME - An organic/inorganic composite separator includes (a) a polyolefin porous substrate having pores; and (b) a porous active layer containing a mixture of inorganic particles and a binder polymer, with which at least one surface of the polyolefin porous substrate is coated, wherein the porous active layer has a peeling force of 5 gf/cm or above, and a thermal shrinkage of the separator after being left alone at 150° C. for 1 hour is 50% or below in a machine direction (MD) or in a transverse direction (TD). This organic/inorganic composite separator solves the problem that inorganic particles in the porous active layer formed on the porous substrate are extracted during an assembly process of an electrochemical device, and also it may prevent an electric short circuit between cathode and anode even when the electrochemical device is overheated. | 04-30-2009 |
| 20090246613 | ORGANIC/INORGANIC COMPOSITE SEPARATOR AND ELECTROCHEMICAL DEVICE CONTAINING THE SAME - An organic/inorganic composite 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 with a plurality of inorganic particles and a binder polymer. The binder polymer is a copolymer including: (a) a first monomer unit having a contact angle to a water drop in the range from 0° to 49°; and (b) a second monomer unit having a contact angle to a water drop in the range from 50° to 130°. This organic/inorganic composite separator has excellent thermal stability, so it may restrain an electric short circuit between a cathode and an anode. In addition, the separator may prevent inorganic particles in the porous coating layer from being extracted during an assembling process of an electrochemical device, thereby improving stability of an electrochemical device. | 10-01-2009 |
| 20090305141 | Electrode Having Porous Active Coating Layer, Manufacturing Method Thereof And Electrochemical Device Containing The Same - Disclosed are an electrode having a porous active coating layer, a manufacturing method thereof and an electrochemical device containing the same. The electrode having a porous active coating layer according to the present invention may be useful to enhance peeling and scratch resistances of the porous active layer and improve a lamination characteristic toward the porous active layer by introducing a porous active layer onto a porous substrate having pores, the porous active layer having heterogeneity of morphology toward a thickness direction in which a content ratio of the binder polymer/inorganic particles present in a surface layer is higher than that of the binder polymer/inorganic particles present inside the surface layer. Accordingly, the stability and performances of the battery can be improved at the same time since the detachment of the inorganic particles from the porous active layer may be reduced during the assembly process of the electrochemical device. | 12-10-2009 |
| 20100159314 | Lithium Secondary Battery With Enhanced Heat-Resistance - Disclosed is an electrode whose surface includes an organic/inorganic composite porous coating layer comprising heat-absorbing inorganic particles and a binder polymer, wherein the heat-absorbing inorganic particle is at least one particle selected from the group consisting of antimony-containing compounds, metal hydroxides, guanidine-based compounds, boron-containing compounds and zinc tartrate compounds. A separator using the heat-absorbing inorganic particles as a component for forming or coating the separator, and an electrochemical device including the electrode and/or the separator are also disclosed. The separator using the heat-absorbing inorganic particles as a component for forming or coating the separator can ensure excellent thermal safety and minimizes degradation of the quality of a battery. | 06-24-2010 |
| 20100167124 | Organic/Inorganic Composite Electrolyte and Electrochemical Device Prepared Thereby - Disclosed is an electrode whose surface includes an organic/inorganic composite porous coating layer comprising porous inorganic particles and a binder polymer, wherein the porous inorganic particles have pores having such a size that lithium ions (Li+) solvated in an electrolyte solvent can pass therethrough. A method for manufacturing the electrode and an electrochemical device using the electrode are also disclosed. The organic/inorganic composite porous coating layer formed on the electrode according to the present invention provides an additional pathway for lithium ion conduction due to a plurality of pore structures present in the porous inorganic particles. Thus, when the organic/inorganic composite porous coating layer is used instead of a conventional polymer-based separator in a battery, the battery can provide improved quality and an increased energy density per unit weight due to a reduced weight of the organic/inorganic composite porous coating layer. | 07-01-2010 |
| 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 |
| 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 |
| 20110045168 | ORGANIC/INORGANIC COMPOSITE POROUS MEMBRANE AND ELECTROCHEMICAL DEVICE USING THE SAME - The present invention provides an organic/inorganic composite porous separator, which comprises: (a) a porous substrate having pores; and (b) an organic/inorganic composite layer formed by coating at least one region selected from the group consisting of a surface of the substrate and a part of pores present in the substrate with a mixture of inorganic porous particles and a binder polymer, wherein the inorganic porous particles have a plurality of macropores with a diameter of 50 nm or greater in the particle itself thereby form a pore structure, a manufacturing method thereof, and an electrochemical device using the same. As an additional pathway for lithium ions is created due to a number of pores existing in the inorganic porous particle itself, degradation in the battery performance can be minimized, and energy density per unit weight can be increased by the weight loss effect. | 02-24-2011 |
