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    Duty control circuit and semiconductor device having the same
    1.
    发明授权
    Duty control circuit and semiconductor device having the same 有权
    占空比控制电路和具有相同功能的半导体器件

    公开(公告)号：US07994835B2

    公开(公告)日：2011-08-09

    申请号：US12585680

    申请日：2009-09-22

    申请人： Kwan-yeob Chae ,  Su-ho Kim ,  Won Lee ,  Sang-hoon Joo ,  Dharmendra Pandit ,  Jong-ryun Choi

    发明人： Kwan-yeob Chae ,  Su-ho Kim ,  Won Lee ,  Sang-hoon Joo ,  Dharmendra Pandit ,  Jong-ryun Choi

    IPC分类号： H03K3/017

    CPC分类号： H03K5/1565 ,  H03K2005/00058

    摘要： A duty control circuit including a clock input unit connected to a first node and a second node, the clock input unit receiving an input clock signal through the first node and changing a voltage of the second node to one of a first voltage level and a second voltage level in response to respective low and high logic levels of the input clock signal, a slew controller connected to the second node, the slew controller including one or more switches controlled by respective control signals, the one or more switches providing one of the first voltage level and the second voltage level to the second node in response to the control signals such that a slew rate of a signal at the second node is varied, and a clock output unit, the clock output unit outputting an output clock signal having a duty that varies.

    摘要翻译： 一种占空比控制电路，包括连接到第一节点和第二节点的时钟输入单元，时钟输入单元通过第一节点接收输入时钟信号，并将第二节点的电压改变为第一电压电平和第二节点之一 响应于输入时钟信号的相应低和高逻辑电平的电压电平，连接到第二节点的转换控制器，所述转换控制器包括由相应控制信号控制的一个或多个开关，所述一个或多个开关提供第一 电压电平和第二电压电平响应于控制信号，使得第二节点处的信号的转换速率改变;以及时钟输出单元，时钟输出单元输出具有占空比的输出时钟信号 不一样。

    Duty control circuit and semiconductor device having the same
    2.
    发明申请
    Duty control circuit and semiconductor device having the same 有权
    占空比控制电路和具有相同功能的半导体器件

    公开(公告)号：US20100073059A1

    公开(公告)日：2010-03-25

    申请号：US12585680

    申请日：2009-09-22

    申请人： Kwan-yeob Chae ,  Su-ho Kim ,  Won Lee ,  Sang-hoon Joo ,  Dharmendra Pandit ,  Jong-ryun Choi

    发明人： Kwan-yeob Chae ,  Su-ho Kim ,  Won Lee ,  Sang-hoon Joo ,  Dharmendra Pandit ,  Jong-ryun Choi

    IPC分类号： H03K3/017

    CPC分类号： H03K5/1565 ,  H03K2005/00058

    摘要： A duty control circuit including a clock input unit connected to a first node and a second node, the clock input unit receiving an input clock signal through the first node and changing a voltage of the second node to one of a first voltage level and a second voltage level in response to respective low and high logic levels of the input clock signal, a slew controller connected to the second node, the slew controller including one or more switches controlled by respective control signals, the one or more switches providing one of the first voltage level and the second voltage level to the second node in response to the control signals such that a slew rate of a signal at the second node is varied, and a clock output unit, the clock output unit outputting an output clock signal having a duty that varies.

    摘要翻译： 一种占空比控制电路，包括连接到第一节点和第二节点的时钟输入单元，时钟输入单元通过第一节点接收输入时钟信号，并将第二节点的电压改变为第一电压电平和第二节点之一 响应于输入时钟信号的相应低和高逻辑电平的电压电平，连接到第二节点的转换控制器，所述转换控制器包括由相应控制信号控制的一个或多个开关，所述一个或多个开关提供第一 电压电平和第二电压电平响应于控制信号，使得第二节点处的信号的转换速率改变;以及时钟输出单元，时钟输出单元输出具有占空比的输出时钟信号 不一样。

    Membrane electrode assembly for fuel cell
    3.
    发明授权
    Membrane electrode assembly for fuel cell 有权
    燃料电池用膜电极组件

    公开(公告)号：US08415072B2

    公开(公告)日：2013-04-09

    申请号：US11508148

    申请日：2006-08-23

    申请人： Jung-min Oh ,  Hae-kyoung Kim ,  Ji-rae Kim ,  Joon-hee Kim ,  Yoon-hoi Lee ,  Sang-hoon Joo

    发明人： Jung-min Oh ,  Hae-kyoung Kim ,  Ji-rae Kim ,  Joon-hee Kim ,  Yoon-hoi Lee ,  Sang-hoon Joo

    IPC分类号： H01M6/02

    CPC分类号： H01M8/1004 ,  H01M8/0232 ,  H01M8/0234 ,  H01M8/0236 ,  H01M8/0239 ,  H01M8/0243 ,  H01M8/0245 ,  H01M8/0247 ,  H01M8/0269 ,  Y02P70/56

    摘要： A membrane electrode assembly for a fuel cell provides a current collector adjacent to an electrode catalyst layer. Since electrons passing between the current collector and the electrode catalyst layer do not pass through a diffusion layer or a supporting layer, the diffusion layer or supporting layer may be non-conductive. Thus, various materials that are hydrophilic, hydrophobic, porous, hydrous, or the like can be used for the diffusion layer and the supporting layer, thereby improving the performance of the fuel cell. In addition, manufacturing costs of the membrane electrode assembly can be decreased since the membrane electrode assembly can be manufactured quickly with low energy.

    摘要翻译： 用于燃料电池的膜电极组件提供与电极催化剂层相邻的集电体。 由于在集电体和电极催化剂层之间通过的电子不通过扩散层或支撑层，所以扩散层或支撑层可以是不导电的。 因此，可以将各种亲水，疏水，多孔，含水等的材料用于扩散层和支撑层，从而提高燃料电池的性能。 此外，膜电极组件的制造成本可以降低，因为可以以低能量快速制造膜电极组件。

    NANOCOMPOSITE, NANOCOMPOSITE ELECTROLYTE MEMBRANE INCLUDING THE SAME AND FUEL CELL INCLUDING THE NANOCOMPOSITE ELECTROLYTE MEMBRANE
    4.
    发明申请
    NANOCOMPOSITE, NANOCOMPOSITE ELECTROLYTE MEMBRANE INCLUDING THE SAME AND FUEL CELL INCLUDING THE NANOCOMPOSITE ELECTROLYTE MEMBRANE 有权
    纳米复合材料，纳米复合膜电解质膜及其包括纳米复合电解质膜的燃料电池

    公开(公告)号：US20080220309A1

    公开(公告)日：2008-09-11

    申请号：US11847036

    申请日：2007-08-29

    申请人： Yeong-Suk Choi ,  Sang-hoon Joo

    发明人： Yeong-Suk Choi ,  Sang-hoon Joo

    IPC分类号： H01M8/10 ,  C08K3/10 ,  B82B1/00

    CPC分类号： H01M8/1011 ,  B82Y30/00 ,  H01M8/04197 ,  H01M8/1016 ,  H01M2300/0065 ,  H01M2300/0088 ,  Y02E60/523 ,  Y10S977/745

    摘要： A nanocomposite includes metal-carbon nanotubes and a sulfonated polysulfone. In the nanocomposite, the sulfonated polysulfone and the metal-carbon nanotubes have strong attraction therebetween due to π-π interactions or van der Waals interactions, and thus the nanocomposite has excellent ionic conductivity and mechanical properties. In addition, the nanocomposite includes a metal that can be used as a catalyst for an anode, and thus the reduction in power generation caused by methanol crossover can be minimized. Therefore, a nanocomposite electrolyte membrane prepared using the nanocomposite can minimize the reduction in power generation caused by the crossover of a polar organic fuel such as methanol. In a fuel cell employing the nanocomposite electrolyte membrane, when an aqueous methanol solution is used as a fuel, crossover of the methanol is more suppressed, and accordingly, the fuel cell has an improved operating efficiency and a longer lifetime.

    摘要翻译： 纳米复合材料包括金属 - 碳纳米管和磺化聚砜。 在纳米复合材料中，由于pi-pi相互作用或范德华相互作用，磺化聚砜和金属 - 碳纳米管之间具有很强的吸引力，因此纳米复合材料具有优异的离子导电性和机械性能。 此外，纳米复合材料包括可用作阳极催化剂的金属，因此可以将由甲醇交叉引起的发电减少最小化。 因此，使用纳米复合材料制备的纳米复合电解质膜可以最小化由极性有机燃料如甲醇的交叉引起的发电减少。 在使用纳米复合电解质膜的燃料电池中，当使用甲醇水溶液作为燃料时，甲醇的交叉被更多地抑制，因此燃料电池具有提高的运行效率和更长的寿命。

    Nanocomposite, nanocomposite electrolyte membrane including the same and fuel cell including the nanocomposite electrolyte membrane
    5.
    发明授权
    Nanocomposite, nanocomposite electrolyte membrane including the same and fuel cell including the nanocomposite electrolyte membrane 有权
    纳米复合材料，包括其的纳米复合电解质膜和包括纳米复合电解质膜的燃料电池

    公开(公告)号：US07842430B2

    公开(公告)日：2010-11-30

    申请号：US11847036

    申请日：2007-08-29

    申请人： Yeong-suk Choi ,  Sang-hoon Joo

    发明人： Yeong-suk Choi ,  Sang-hoon Joo

    IPC分类号： H01M2/00

    CPC分类号： H01M8/1011 ,  B82Y30/00 ,  H01M8/04197 ,  H01M8/1016 ,  H01M2300/0065 ,  H01M2300/0088 ,  Y02E60/523 ,  Y10S977/745

    摘要： A nanocomposite includes metal-carbon nanotubes and a sulfonated polysulfone. In the nanocomposite, the sulfonated polysulfone and the metal-carbon nanotubes have strong attraction therebetween due to π-π interactions or van der Waals interactions, and thus the nanocomposite has excellent ionic conductivity and mechanical properties. In addition, the nanocomposite includes a metal that can be used as a catalyst for an anode, and thus the reduction in power generation caused by methanol crossover can be minimized. Therefore, a nanocomposite electrolyte membrane prepared using the nanocomposite can minimize the reduction in power generation caused by the crossover of a polar organic fuel such as methanol. In a fuel cell employing the nanocomposite electrolyte membrane, when an aqueous methanol solution is used as a fuel, crossover of the methanol is more suppressed, and accordingly, the fuel cell has an improved operating efficiency and a longer lifetime.

    摘要翻译： 纳米复合材料包括金属 - 碳纳米管和磺化聚砜。 在纳米复合材料中，磺化聚砜和金属 - 碳纳米管之间具有很强的吸引力，由于＆pgr; 相互作用或范德华相互作用，因此纳米复合材料具有优异的离子导电性和机械性能。 此外，纳米复合材料包括可用作阳极催化剂的金属，因此可以将由甲醇交叉引起的发电减少最小化。 因此，使用纳米复合材料制备的纳米复合电解质膜可以最小化由极性有机燃料如甲醇的交叉引起的发电减少。 在使用纳米复合电解质膜的燃料电池中，当使用甲醇水溶液作为燃料时，甲醇的交叉被更多地抑制，因此燃料电池具有提高的运行效率和更长的寿命。

    CATALYST USED TO FORM FUEL CELL AND FUEL CELL USING THE SAME
    6.
    发明申请
    CATALYST USED TO FORM FUEL CELL AND FUEL CELL USING THE SAME 审中-公开
    用于形成燃料电池和燃料电池的催化剂

    公开(公告)号：US20080107956A1

    公开(公告)日：2008-05-08

    申请号：US11690341

    申请日：2007-03-23

    申请人： Dae-jong Yoo ,  Chan-ho Pak ,  Hyuk Chang ,  Sang-hoon Joo

    发明人： Dae-jong Yoo ,  Chan-ho Pak ,  Hyuk Chang ,  Sang-hoon Joo

    IPC分类号： H01M4/92 ,  B01J23/14 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J23/52 ,  H01M4/88 ,  H01M4/90

    CPC分类号： H01M4/92 ,  H01M4/8657 ,  H01M4/8885

    摘要： A catalyst, a method of preparing the catalyst, and a fuel cell using the catalyst. The catalyst includes a catalyst metal particle, and a porous coating layer of a conductive ceramic material disposed on the surface of the catalyst metal particle. The catalyst has a methanol tolerance index of 80%, or more, a smaller particle size than a commercially available Pt-black catalyst manufactured through a polyol process. The catalyst can include a PT catalyst metal particle that is surface treated, or coated, with a conductive ceramic ATO. The catalyst has an excellent ORR activity in the presence of methanol, and an enhanced tolerance with respect to methanol. A fuel cell, including an electrode manufactured using the catalyst, has a high energy density and a high fuel efficiency.

    摘要翻译： 催化剂，制备催化剂的方法和使用该催化剂的燃料电池。 催化剂包括催化剂金属颗粒和设置在催化剂金属颗粒表面上的导电陶瓷材料的多孔涂层。 与通过多元醇法制造的市售Pt-black催化剂相比，催化剂的甲醇耐受指数为80％以上，粒径小。 催化剂可以包括用导电陶瓷ATO进行表面处理或涂覆的PT催化剂金属颗粒。 该催化剂在甲醇存在下具有优异的ORR活性，并且相对于甲醇具有增强的耐受性。 包括使用该催化剂制造的电极的燃料电池具有高能量密度和高燃料效率。

    Mesoporous carbon, method of preparing the same, and fuel cell using the carbon
    7.
    发明授权
    Mesoporous carbon, method of preparing the same, and fuel cell using the carbon 有权
    介孔碳，其制备方法和使用碳的燃料电池

    公开(公告)号：US07854913B2

    公开(公告)日：2010-12-21

    申请号：US11443160

    申请日：2006-05-31

    申请人： Sang-hoon Joo ,  Chan-ho Pak ,  Hyuk Chang ,  Ji-man Kim ,  Hyung-ik Lee

    发明人： Sang-hoon Joo ,  Chan-ho Pak ,  Hyuk Chang ,  Ji-man Kim ,  Hyung-ik Lee

    IPC分类号： B01J19/08 ,  H01M8/00

    CPC分类号： H01M4/926 ,  B82Y30/00 ,  C01B32/00

    摘要： A mesoporous carbon is prepared by mixing a carbon precursor, an acid, and a solvent to obtain a carbon precursor mixture; impregnating an ordered mesoporous silica (OMS) with the carbon precursor mixture; carbonizing the impregnated OMS at 800 to 1300° C. by irradiating microwave energy with a power of 100 to 2000 W thereon to form an OMS-carbon composite; and removing the mesoporous silica from the OMS-carbon composite. The method of preparing a mesoporous carbon can significantly reduce a carbonization time by carbonizing a carbon precursor using microwave energy in a silica template compared to a conventional method using a heat treatment. A supported catalyst and a fuel cell include the mesoporous carbon.

    摘要翻译： 通过混合碳前体，酸和溶剂来制备介孔碳以获得碳前体混合物; 用碳前体混合物浸渍有序介孔二氧化硅（OMS）; 通过在其上照射100至2000W的功率的微波能量来在800至1300℃下将浸渍的OMS碳化，以形成OMS-碳复合材料; 并从OMS-碳复合材料中除去介孔二氧化硅。 制备介孔碳的方法与使用热处理的常规方法相比，通过使用微波能量在二氧化硅模板中碳化碳前体可显着降低碳化时间。 载体催化剂和燃料电池包括介孔碳。

    Supported catalyst, method of preparing the same, and fuel cell using the same
    8.
    发明申请
    Supported catalyst, method of preparing the same, and fuel cell using the same 有权
    负载催化剂，其制备方法和使用其的燃料电池

    公开(公告)号：US20070270305A1

    公开(公告)日：2007-11-22

    申请号：US11708600

    申请日：2007-02-21

    申请人： Chan-ho Pak ,  Dae-jong Yoo ,  Sang-hoon Joo ,  Hyuk Chang ,  Seol-ah Lee

    发明人： Chan-ho Pak ,  Dae-jong Yoo ,  Sang-hoon Joo ,  Hyuk Chang ,  Seol-ah Lee

    IPC分类号： B01J31/00

    CPC分类号： H01M4/926 ,  H01M4/8657 ,  H01M4/8814 ,  H01M4/885 ,  H01M4/92 ,  H01M4/921 ,  H01M8/1007 ,  H01M8/1011 ,  Y02E60/523 ,  Y02P70/56

    摘要： A method of preparing a supported catalyst, the method comprising mixing a first catalytic metal precursor and a first solvent to obtain a first catalytic metal precursor mixture; mixing a carbon support for catalyst and the first catalytic metal precursor mixture, and drying the mixture to obtain a primary supported catalyst precursor; subjecting the primary supported catalyst precursor to a hydrogen reduction heat treatment, to obtain a primary supported catalyst; mixing the primary supported catalyst and a polyhydric alcohol to obtain a primary supported catalyst mixture; mixing a second catalytic metal precursor and a second solvent to obtain a second catalytic metal precursor mixture; mixing the primary supported catalyst mixture and the second catalytic metal precursor mixture to obtain a secondary supported catalyst precursor mixture; and adjusting the pH of the secondary supported catalyst precursor mixture, and then heating the secondary supported catalyst precursor mixture to obtain a supported catalyst, a supported catalyst prepared by the method, an electrode comprising the supported catalyst, and a fuel cell including the electrode are provided. A supported catalyst having a desired amount of loaded catalytic metal particles can be obtained by preparing a primary supported catalyst containing catalytic metal particles that are obtained by a primary gas phase reduction reaction of a portion of the final loading amount of catalytic metal, and reducing the remaining portion of the catalytic metal by a secondary liquid phase reduction reaction. The supported catalyst contains catalytic metal particles having a very small average particle size, which are uniformly distributed on a carbon support at a high concentration, and thus exhibits maximal catalyst activity. A fuel cell produced using the supported catalyst has improved efficiency.

    摘要翻译： 一种制备负载型催化剂的方法，所述方法包括混合第一催化金属前体和第一溶剂以获得第一催化金属前体混合物; 混合催化剂用碳载体和第一催化金属前体混合物，干燥混合物得到主要负载型催化剂前体; 对初级负载催化剂前体进行氢还原热处理，得到主要负载型催化剂; 将主要负载型催化剂和多元醇混合，得到主要负载型催化剂混合物; 混合第二催化金属前体和第二溶剂以获得第二催化金属前体混合物; 将主要负载的催化剂混合物和第二催化金属前体混合物混合，得到二次负载催化剂前体混合物; 调节二次负载型催化剂前体混合物的pH，然后加热二次负载型催化剂前体混合物，得到负载型催化剂，通过该方法制备的负载催化剂，包含负载型催化剂的电极和包含该电极的燃料电池 提供。 具有所需量的负载的催化金属颗粒的负载型催化剂可以通过制备含有催化金属颗粒的主负载催化剂获得，所述催化金属颗粒是通过催化金属的最终负载量的一部分一次气相还原反应获得的， 催化金属的剩余部分通过二次液相还原反应。 载体催化剂含有平均粒径非常小的催化金属颗粒，其以高浓度均匀分布在碳载体上，因此表现出最大的催化剂活性。 使用负载型催化剂制造的燃料电池具有提高的效率。