Patent application number | Description | Published |
20100028776 | CATHODE ACTIVE MATERIAL AND SECONDARY BATTERY COMPRISING THE SAME - Disclosed are a cathode active material and a secondary battery including the same. Herein, the cathode active material includes (a) a first lithium-containing metal composite oxide and (b) a second lithium-containing metal composite oxide coated on an entire particle surface of the first lithium-containing metal composite oxide, the second lithium-containing metal composite oxide having a higher resistance and a lower potential vs. lithium potential (Li/Li″ 1) than the first lithium-containing metal composite oxide. In the disclosed cathode active material, an entire surface of a first lithium-containing metal composite oxide is coated with a second lithium-containing metal composite oxide having a high resistance value and a low potential vs. lithium potential. Therefore, during an internal short of a secondary battery, it is possible to slow down the moving rate of a large amount of lithium ions and electrons from an anode to a cathode, and thus to prevent heat generation caused by the occurrence of temporary over-current. Also, it is possible to increase the temperature where a cathode active material is decomposed and gas is generated, and to improve thermal stability by inhibiting side reactions of the cathode active material and electrolyte. | 02-04-2010 |
20100035131 | ELECTROCHEMICAL DEVICE ENSURING A GOOD SAFETY - Disclosed is the structure of a center pin inserted into the winding center of a winding-type electrode assembly of an electrochemical device, which has a case containing the winding-type electrode assembly. The center pin can be manufactured through a simple process and can secure the safety of an electrochemical device when physical impact (e.g. squeezing, shock) is applied from the outside or when the internal temperature rises. The center pin is manufactured by winding a planar substrate, which has at least two protrusions formed in an embossing type or which has at least two scores formed in a predetermined shape, into a tubular shape. | 02-11-2010 |
20100112445 | SECONDARY BATTERY WITH IMPROVED SAFETY - The present invention provides a cathode comprising two or more lithium-containing metal composite oxides, having different potentials versus lithium (Li/Li+) and different impedances, the cathode comprising: (a) a first lithium-containing metal composite oxide; and (b) a second lithium-containing metal composite oxide, which has a high impedance and low potential versus lithium (Li/Li+), compared to those of the first lithium-containing metal composite oxide. In the invention, two or more lithium-containing metal composite oxides are used in combination as cathode components in a battery, whereby, when a short circuit occurs in the battery, the instantaneous flow of a large amount of current can be minimized and, at the same time, the accumulation of heat in the battery can be reduced, thus ensuring the safety of the battery. | 05-06-2010 |
20100237275 | METHOD FOR PREPARING LITHIUM METAL PHOSPHATE - Disclosed is a method for preparing a lithium metal phosphate represented by the following Formula 1 by using a mixture of a metal (M) with a metal oxide containing the same metal: | 09-23-2010 |
20110052461 | FILTER TYPE TRAPPING AGENT FOR VOLATILE CESIUM COMPOUND AND TRAPPING METHOD FOR VOLATILE CESIUM COMPOUND THEREOF - A filter type trapping agent for volatile cesium compound and trapping method for volatile cesium compound thereof are provided. More particularly, a filter type trapping agent for volatile cesium compound including silica 40˜65% by weight of silica, 15˜30% by weight of alumina, 5˜15% by weight of iron oxide, 1˜15% by weight of molybdenum oxide, 1˜10% by weight of chromium oxide, and 1˜10% by weight of vanadium oxide and trapping method for volatile cesium compound thereof are provided. Through a filter type trapping agent for volatile cesium compound and a trapping method, only cesium can be selectively separated among the nuclear fission gases. Accordingly, by disposing only the filter where cesium is trapped, the efficiency of an off-gas process improves, expense for disposing filter wastes decreases, and a cesium isotope of the waste filter can be recycled. Therefore, many forms of cesium compound gas are made insoluble efficiently. | 03-03-2011 |
20120100430 | CATHODE ACTIVE MATERIAL AND SECONDARY BATTERY COMPRISING THE SAME - Disclosed are a cathode active material and a secondary battery including the same, wherein the cathode active material includes (a) a first lithium-containing metal composite oxide and (b) a second lithium-containing metal composite oxide coated on an entire particle surface of the first lithium-containing metal composite oxide particle, the second lithium-containing metal composite oxide having a higher resistance and a lower potential vs. lithium potential (Li/Li+) than the first lithium-containing metal composite oxide. | 04-26-2012 |
20140150515 | Horizontal Type Slitting Apparatus For Decladding of a Fuel Rod - A horizontal type slitting apparatus for decladding of a fuel rod is disclosed. The apparatus optionally includes a plurality of rollers configured to receive, extrude, and transfer a fuel rod, a roller fixing portion configured to fix the rollers by a hydraulic pressure, a slitting portion configured to slit cladding tube of the fuel rod, and a slitter fixing portion configured to fix the slitter portion by a hydraulic pressure. | 06-05-2014 |
20150086271 | APPARATUS FOR PURIFYING ASBESTOS-CONTAMINATED SOIL - Disclosed is an apparatus for purifying asbestos-contaminated soil capable of increasing the removable efficiency of removing the soil by applying a drop method, facilitating the scattering of asbestos by extending the drop time of soil, and improving the separation efficiency of the asbestos from the contaminated soil by preventing the generation of eddies in the soil. The apparatus includes a blowing unit | 03-26-2015 |