公开(公告)号：US20090225498A1

公开(公告)日：2009-09-10

申请号：US12228730

申请日：2008-08-15

申请人： Eun Sung Lee ,  Kyun Young Ahn ,  Kwang Bum Kim ,  Kyung Wan Nam ,  Sang Bok Ma ,  Won Sub Yoon

发明人： Eun Sung Lee ,  Kyun Young Ahn ,  Kwang Bum Kim ,  Kyung Wan Nam ,  Sang Bok Ma ,  Won Sub Yoon

IPC分类号： H01G9/00 ,  H01G9/15

CPC分类号： H01G11/32 ,  H01G11/06 ,  H01G11/46 ,  Y02E60/13

摘要： The present invention provides an asymmetric hybrid capacitor, in which metal oxide containing lithium and capable of producing lithium ions by an electrochemical reaction and supplying the lithium ions in an electrolyte in the capacitor is used as a positive electrode active material, and metal oxide capable of accepting the lithium ions supplied through the electrolyte is used as a negative electrode active material, such that the lithium ions of the same participate in the electrochemical reactions at both electrodes. As a result, it is possible to minimize reduction in ionic conductivity during charge/discharge, compared with conventional asymmetric hybrid capacitors, in which metal oxide and a carbon material are used as electrode materials, respectively. Moreover, since metal oxide having high specific capacitance is used to form both electrodes, it is possible to maximize energy density and power density.

摘要翻译： 本发明提供一种不对称混合电容器，其中使用含锂的能够通过电化学反应产生锂离子并将电解质中的锂离子供应到电容器中的金属氧化物作为正极活性材料， 接受通过电解质供给的锂离子用作负极活性物质，使得其中的锂离子参与两电极的电化学反应。 结果，与使用金属氧化物和碳材料分别用作电极材料的常规非对称混合电容器相比，可以使充电/放电期间离子导电率的降低最小化。 此外，由于使用高比电容的金属氧化物形成两个电极，所以可以使能量密度和功率密度最大化。

公开(公告)号：US08053026B2

公开(公告)日：2011-11-08

申请号：US12020503

申请日：2008-01-25

申请人： Jin Go Kim ,  Sang Bok Ma ,  Kwang Heon Kim ,  Kwang Bum Kim

发明人： Jin Go Kim ,  Sang Bok Ma ,  Kwang Heon Kim ,  Kwang Bum Kim

IPC分类号： B05D5/12

CPC分类号： B82Y30/00 ,  B82Y40/00 ,  C01B32/174 ,  C01B2202/28 ,  H01G9/058 ,  H01G11/36 ,  H01G11/46 ,  Y02E60/13 ,  Y10T428/2918

摘要： A method for the synthesis of nanocomposites is provided. The method comprises the steps of mixing carbon nanotubes with a urea solution to form urea/carbon nanotube composites (first step), mixing the urea/carbon nanotube composites with a solution of a metal oxide or hydroxide precursor to prepare a precursor solution (second step), and hydrolyzing the urea in the precursor solution to form a metal oxide or hydroxide coating on the carbon nanotubes (third step). Further provided are nanocomposites synthesized by the method. In the nanocomposites, a metal oxide or hydroxide is coated to a uniform thickness in the nanometer range on porous carbon nanotubes. Advantageously, the thickness of the coating can be easily regulated by controlling the urea content of urea/carbon nanotube composites as precursors. In addition, the nanocomposites are nanometer-sized powders and have high electrical conductivity and large specific surface area. Therefore, the nanocomposites are useful as electrode active materials for electrochemical capacitors, including pseudo capacitors and electrochemical double layer capacitors, lithium secondary batteries, and polymer batteries. Further provided is a capacitor comprising the nanocomposites.

摘要翻译： 提供了一种合成纳米复合材料的方法。 该方法包括以下步骤：将碳纳米管与尿素溶液混合以形成脲/碳纳米管复合物（第一步），将尿素/碳纳米管复合物与金属氧化物或氢氧化物前体的溶液混合以制备前体溶液（第二步 ），并且在前体溶液中水解尿素以在碳纳米管上形成金属氧化物或氢氧化物涂层（第三步）。 还提供了通过该方法合成的纳米复合材料。 在纳米复合材料中，金属氧化物或氢氧化物在多孔碳纳米管上以纳米范围涂覆至均匀的厚度。 有利地，通过控制尿素/碳纳米管复合材料的尿素含量作为前体，可以容易地调节涂层的厚度。 此外，纳米复合材料是纳米尺寸的粉末，具有高的电导率和较大的比表面积。 因此，纳米复合材料可用作电化学电容器的电极活性材料，包括伪电容器和电化学双层电容器，锂二次电池和聚合物电池。 还提供了包含纳米复合材料的电容器。

公开(公告)号：US20110318639A1

公开(公告)日：2011-12-29

申请号：US12926844

申请日：2010-12-13

申请人： Hak Kwan Kim ,  Hyun Chul Jung ,  Dong Hyeok Choi ,  Kwang Bum Kim ,  Sang Bok Ma ,  Hye Ryun Choi

发明人： Hak Kwan Kim ,  Hyun Chul Jung ,  Dong Hyeok Choi ,  Kwang Bum Kim ,  Sang Bok Ma ,  Hye Ryun Choi

IPC分类号： H01M4/505 ,  G05D23/00 ,  H01M4/88 ,  B82Y30/00

CPC分类号： H01G11/50 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/168 ,  C01G45/1242 ,  C01P2004/80 ,  H01G11/30 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M4/587 ,  Y02E60/13 ,  Y02T10/7022

摘要： There is provided a method for manufacturing a lithium manganese oxide-carbon nano composite by mixing a lithium ion solution with a manganese ion solution, dispersing a carbon material in the solution in which the lithium ion is mixed with the manganese ion, and forming the lithium manganese oxide on a surface of the carbon material by maintaining the solution in which the carbon material is dispersed at a predetermined temperature. In addition, there is provided the lithium manganese oxide-carbon nano composite formed by coating the carbon material with the lithium manganese oxide at a thickness of several nm. There is provided a manufacturing apparatus capable of coating the carbon material with the lithium manganese oxide at a thickness of several nm.

摘要翻译： 提供了通过将锂离子溶液与锰离子溶液混合制造锂锰氧化物 - 碳纳米复合材料的方法，将碳材料分散在锂离子与锰离子混合的溶液中，并形成锂 通过将碳材料分散在预定温度下的溶液保持在碳材料的表面上的氧化锰。 另外，提供了通过将碳材料与数μm的厚度的锂锰氧化物覆盖而形成的锂锰氧化物 - 碳纳米复合体。 提供了能够以数nm的厚度涂覆碳素材料的制造装置。

公开(公告)号：US20090042028A1

公开(公告)日：2009-02-12

申请号：US12020503

申请日：2008-01-25

申请人： Jin Go Kim ,  Sang Bok Ma ,  Kwang Heon Kim ,  Kwang Bum Kim

发明人： Jin Go Kim ,  Sang Bok Ma ,  Kwang Heon Kim ,  Kwang Bum Kim

IPC分类号： B05D5/12 ,  H01G4/008

CPC分类号： B82Y30/00 ,  B82Y40/00 ,  C01B32/174 ,  C01B2202/28 ,  H01G9/058 ,  H01G11/36 ,  H01G11/46 ,  Y02E60/13 ,  Y10T428/2918

摘要： A method for the synthesis of nanocomposites is provided. The method comprises the steps of mixing carbon nanotubes with a urea solution to form urea/carbon nanotube composites (first step), mixing the urea/carbon nanotube composites with a solution of a metal oxide or hydroxide precursor to prepare a precursor solution (second step), and hydrolyzing the urea in the precursor solution to form a metal oxide or hydroxide coating on the carbon nanotubes (third step). Further provided are nanocomposites synthesized by the method. In the nanocomposites, a metal oxide or hydroxide is coated to a uniform thickness in the nanometer range on porous carbon nanotubes. Advantageously, the thickness of the coating can be easily regulated by controlling the urea content of urea/carbon nanotube composites as precursors. In addition, the nanocomposites are nanometer-sized powders and have high electrical conductivity and large specific surface area. Therefore, the nanocomposites are useful as electrode active materials for electrochemical capacitors, including pseudo capacitors and electrochemical double layer capacitors, lithium secondary batteries, and polymer batteries. Further provided is a capacitor comprising the nanocomposites.

摘要翻译： 提供了一种合成纳米复合材料的方法。 该方法包括以下步骤：将碳纳米管与尿素溶液混合以形成脲/碳纳米管复合物（第一步），将尿素/碳纳米管复合物与金属氧化物或氢氧化物前体的溶液混合以制备前体溶液（第二步 ），并且在前体溶液中水解尿素以在碳纳米管上形成金属氧化物或氢氧化物涂层（第三步）。 还提供了通过该方法合成的纳米复合材料。 在纳米复合材料中，金属氧化物或氢氧化物在多孔碳纳米管上以纳米范围涂覆至均匀的厚度。 有利地，通过控制尿素/碳纳米管复合材料的尿素含量作为前体，可以容易地调节涂层的厚度。 此外，纳米复合材料是纳米尺寸的粉末，具有高的电导率和较大的比表面积。 因此，纳米复合材料可用作电化学电容器的电极活性材料，包括伪电容器和电化学双层电容器，锂二次电池和聚合物电池。 还提供了包含纳米复合材料的电容器。