| Patent application number | Description | Published |
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| 20100119947 | METHOD FOR FORMING CATHODE ACTIVE MATERIAL POWDER FOR LITHIUM SECONDARY CELL, AND CATHODE ACTIVE MATERIAL POWDER FOR LITHIUM SECONDARY CELL PREPARED USING THE METHOD - Provided are a method for forming a cathode active material powder for a lithium secondary cell, and a cathode active material powder prepared using the method. According to the method, a coating layer consisting of a combination of a water-soluble polymer and a metal oxide may be formed on the particle surface of the cathode active material, thereby forming a uniform thickness of the coating layer. Thus, the elution of manganese may be prevented, thereby improving the capacity of the cathode active material and providing excellent cycle characteristics. | 05-13-2010 |
| 20110045337 | VACUUM-SEALING-TYPE FLEXIBLE-FILM PRIMARY BATTERY AND METHOD OF MANUFACTURING THE SAME - Provided are a vacuum-sealing-type flexible-film primary battery and a method of manufacturing the same. The primary battery includes a battery assembly comprising a positive electrode plate including a positive electrode collector having a first conductive carbon layer disposed on a surface-treated inner surface of a first pouch and a positive electrode layer disposed on the first conductive carbon layer of the positive electrode collector, a negative electrode plate including a negative electrode collector having a second conductive carbon layer disposed on a surface-treated inner surface of a second pouch and a negative electrode layer disposed on the second conductive carbon layer of the negative electrode collector, and an adhesion/post-injection polymer electrolyte layer interposed between the positive electrode plate and the negative electrode plate, wherein the battery assembly is completely sealed. The flexible-film primary battery may employ the pouch as a collector film to improve flexibility. Also, the flexible-film primary battery may be completely sealed using the pouch to improve a retention period and cell performance. Furthermore, the flexible-film primary battery may be manufactured using a screen printing technique, thereby facilitating a roll-to-roll sequential process. | 02-24-2011 |
| 20110143200 | METHOD OF MANUFACTURING CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND 1-D NANOCLUSTER CATHODE ACTIVE MATERIAL WITH CHESTNUT TYPE MORPHOLOGY OBTAINED BY THE METHOD - Provided are a method of manufacturing a cathode active material for a lithium battery, and a cathode active material obtained by the method. The method includes forming a precursor of a one-dimensional nanocluster manganese dioxide with a chestnut-type morphology, inserting lithium into the formed precursor and synthesizing a one-dimensional nanocluster cathode active material particle with a chestnut morphology, coating a water-soluble polymer on a surface of the cathode active material particle, adsorbing a metal ion to the surface of the cathode active material particle coated with the water-soluble polymer, and sintering the cathode active material particle to obtain the one-dimensional nanocluster cathode active material with a chestnut morphology. The cathode active material manufactured by the above method is a one-dimensional nanocluster with a chestnut-type morphology, which has a uniform-thick metal oxide layer on its surface, thereby ensuring an improved capacity of the cathode active material and an excellent cycle characteristic. | 06-16-2011 |
| Patent application number | Description | Published |
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| 20090155001 | PHC PILE USED IN PERMANENT RETAINING WALL STRUCTURE AND CONNECTION METHOD OF PHC PILE - The present invention relates to a PHC pile used in a permanent retaining wall structure, and a connection method thereof, and more particularly, to a method of connecting PHC piles to each other by inserting a connection bar into connection pipes embedded in sheaths of the PHC piles. To this end, the PHC pile comprises a left connection pipe installed at one side of the sheath of the PHC pile and a right connection pipe embedded at the other opposite side of the sheath. Further, the method of connecting the PHC pile to each other comprises the steps of inserting a water-proof material into inner semi-cylindrical grooves of the connection pipes, inserting the connection bar between the connection pipes of the PHC piles, and consecutively connecting a plurality of PHC piles to one another by repeating the above steps. | 06-18-2009 |
| 20100003074 | CONNECTING STRUCTURE OF STEEL BAR - A steel bar connecting structure is disclosed. The steel bar connecting structure includes a connecting sleeve having on an inner circumference thereof an internal threaded part, and a steel bar having an external threaded part which engages with the internal threaded part. The steel bar is inserted into the connecting sleeve. Each of the internal threaded part and the external threaded part is formed such that a crest of each of threads thereof is cut. Thereby, when the steel bar is strongly coupled to the connecting sleeve, a neighboring crest and root of the internal threaded part and the external threaded part are not in contact with each other, whereas inclined flanks of the threads of the internal threaded part and the external threaded part are in close contact with each other. | 01-07-2010 |
| 20100199597 | MULTI-HORIZONTAL STRUCTURE MEMBER FORMING METHOD - A method of forming multiple horizontal structural members is disclosed. The method includes building a vertical structural member by a sliding construction method, lifting a horizontal form frame unit using sliding construction equipment, installing a frame support structure under the horizontal form frame unit, casting concrete into the horizontal form frame unit to form a horizontal structural member, and simultaneously building the horizontal structural members to several stories. | 08-12-2010 |
