公开(公告)号：US09203098B2

公开(公告)日：2015-12-01

申请号：US11257528

申请日：2005-10-26

申请人： Jiusheng Guo ,  Aruna Zhamu ,  Bor Z. Jang

发明人： Jiusheng Guo ,  Aruna Zhamu ,  Bor Z. Jang

IPC分类号： H01M8/10 ,  H01M8/04

CPC分类号： H01M8/04089 ,  H01M8/04007 ,  H01M8/04037 ,  H01M8/04186 ,  H01M8/04194 ,  H01M8/04197 ,  H01M8/1004 ,  H01M8/1007 ,  H01M8/1011 ,  H01M8/1013 ,  H01M2250/20 ,  H01M2250/30 ,  Y02B90/18 ,  Y02E60/522 ,  Y02E60/523 ,  Y02T90/32

摘要： A fuel cell including primarily (a) a membrane electrode assembly, which comprises (i) a proton exchange membrane having a front face and a rear face, (ii) an anode being coupled to the front face, and (iii) a cathode being coupled to the rear face; (b) a fuel permeation-controlling member positioned in front of the anode; the member being substantially impermeable to an organic fuel or water at an ambient temperature or below, but being permeable at a temperature higher than an activation temperature; (c) heating means in control relation to the fuel permeation-controlling member to activate fuel permeation through the member on demand. The invented fuel cell is compact and lightweight, with significantly reduced fuel crossover and improved fuel utilization efficiency. The fuel cell is particularly useful for powering small vehicles and portable devices such as a notebook computer, a personal digital assistant, a mobile phone, and a digital camera.

摘要翻译： 一种燃料电池，其主要包括（a）膜电极组件，其包括（i）质子交换膜，其具有前表面和后表面，（ii）阳极与前表面耦合，和（iii）阴极 耦合到后面; （b）位于阳极前面的燃料渗透控制构件; 所述构件在环境温度或更低温度下对有机燃料或水基本上不可渗透，但在高于活化温度的温度下是可渗透的; （c）与燃料渗透控制构件控制关系的加热装置，以根据需要激活通过构件的燃料渗透。 本发明的燃料电池紧凑且重量轻，燃料交叉显着减少，燃料利用效率得到提高。 燃料电池对于小型车辆和便携式设备如笔记本电脑，个人数字助理，移动电话和数码相机的供电特别有用。

公开(公告)号：US20150239741A1

公开(公告)日：2015-08-27

申请号：US13999397

申请日：2014-02-21

申请人： David Joseph Burton ,  Bor Z. Jang ,  Aruna Zhamu

发明人： David Joseph Burton ,  Bor Z. Jang ,  Aruna Zhamu

IPC分类号： C01B31/04 ,  C08G65/48 ,  C07B41/02 ,  C07B43/04 ,  C07B43/08 ,  C07B41/04 ,  C08G63/91 ,  C08F120/32 ,  C07D301/02 ,  C07B41/08

CPC分类号： C01B31/0469 ,  C01B32/19 ,  C01B32/23 ,  C07D301/02 ,  C08G65/321 ,  C08L71/02

摘要： The invention provides a method of producing a graphene material from a starting graphitic material. In an embodiment, the method comprises: (a) dispersing the starting graphitic material in a liquid medium to form a graphite suspension; and (b) introducing the graphite suspension into a hydrodynamic cavitation reactor that generates and collapses cavitation or bubbles in the liquid medium to exfoliate and separate graphene planes from the starting graphitic material for producing the graphene material. The process is fast (minutes as opposed to hours or days of conventional processes), environmentally benign, and highly scalable. The reactor can concurrently perform the functions of graphene production, chemical functionalization, dispersion, and mixing with a polymer to make a composite.

摘要翻译： 本发明提供从起始石墨材料生产石墨烯材料的方法。 在一个实施方案中，该方法包括：（a）将起始石墨材料分散在液体介质中以形成石墨悬浮液; 和（b）将石墨悬浮液引入到流体动力空化反应器中，该反应器在液体介质中产生和塌陷空化或气泡，以将石墨烯平面与用于生产石墨烯材料的起始石墨材料分离和分离。 这个过程是快速的（分钟，而不是常规过程的几天或几天），环境友好和高度可扩展。 反应器可以同时执行石墨烯生产，化学官能化，分散和与聚合物混合以制备复合材料的功能。

公开(公告)号：US09029019B2

公开(公告)日：2015-05-12

申请号：US11893398

申请日：2007-08-17

申请人： Bor Z. Jang ,  Aruna Zhamu ,  Jinjun Shi ,  Jiusheng Guo

发明人： Bor Z. Jang ,  Aruna Zhamu ,  Jinjun Shi ,  Jiusheng Guo

IPC分类号： H01M4/587 ,  H01M4/131 ,  H01G11/50 ,  H01M10/0525 ,  H01M4/62

CPC分类号： H01M4/587 ,  H01G11/50 ,  H01M4/131 ,  H01M4/621 ,  H01M4/624 ,  H01M4/625 ,  H01M10/0525 ,  Y02E60/122 ,  Y02E60/13

摘要： A lithium secondary battery comprising a positive electrode, a negative electrode comprising a carbonaceous material which is capable of absorbing and desorbing lithium ions, and a non-aqueous electrolyte disposed between the negative electrode and the positive electrode. The carbonaceous material comprises a graphite crystal structure having an interplanar spacing d002 of at least 0.400 nm (preferably at least 0.55 nm) as determined from a (002) reflection peak in powder X-ray diffraction. This larger interplanar spacing implies a larger interstitial space between two graphene planes to accommodate a greater amount of lithium. The battery exhibits an exceptional specific capacity, excellent reversible capacity, and long cycle life.

公开(公告)号：US08947854B2

公开(公告)日：2015-02-03

申请号：US13573844

申请日：2012-10-09

申请人： Aruna Zhamu ,  Zhenning Yu ,  Chen-guang Liu ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Zhenning Yu ,  Chen-guang Liu ,  Bor Z. Jang

IPC分类号： H01G9/00 ,  H01G11/36 ,  B82Y30/00

CPC分类号： H01G11/36 ,  B82Y30/00 ,  B82Y40/00 ,  H01G11/32 ,  Y02E60/13 ,  Y02T10/7022 ,  Y10S977/734 ,  Y10S977/932 ,  Y10S977/948

摘要： A spacer-modified nano graphene platelet electrode, comprising: (a) multiple nano graphene platelets or sheets having an average thickness smaller than 10 nm; and (b) discrete, non-metallic nano-scaled particles that are disposed between two graphene platelets or sheets to serve as a spacer. In such a spacer-modified graphene electrode, large amounts of electrolyte-accessible pores are formed, enabling the formation of large amounts of electric double layer charges in a supercapacitor, which exhibits an exceptionally high specific capacitance.

摘要翻译： 一种间隔物改性的纳米石墨烯片晶电极，包括：（a）平均厚度小于10nm的多个纳米石墨烯片晶或片; 和（b）分散的非金属纳米级粒子，其设置在两个石墨烯片晶片之间以用作间隔物。 在这种间隔物改性的石墨烯电极中，形成大量的电解质可接近的孔，使得能够在超级电容器中形成大量的双电层电荷，这表现出特别高的比电容。

公开(公告)号：US08865040B2

公开(公告)日：2014-10-21

申请号：US13021041

申请日：2011-02-04

申请人： Bor Z. Jang ,  Aruna Zhamu ,  Lulu Song

发明人： Bor Z. Jang ,  Aruna Zhamu ,  Lulu Song

IPC分类号： C04B35/00 ,  H01M8/02 ,  C08J5/04 ,  H01B1/24

CPC分类号： H01M8/0221 ,  C08J5/04 ,  H01B1/24 ,  H01M8/0213 ,  H01M8/0226 ,  H01M8/0228 ,  Y02E60/50 ,  Y02P70/56

摘要： This invention provides a fuel cell flow field plate or bipolar plate having flow channels on faces of the plate, comprising an electrically conductive polymer composite. The composite is composed of (A) at least 50% by weight of a conductive filler, comprising at least 5% by weight reinforcement fibers, expanded graphite platelets, graphitic nano-fibers, and/or carbon nano-tubes; (B) polymer matrix material at 1 to 49.9% by weight; and (C) a polymer binder at 0.1 to 10% by weight; wherein the sum of the conductive filler weight %, polymer matrix weight % and polymer binder weight % equals 100% and the bulk electrical conductivity of the flow field or bipolar plate is at least 100 S/cm. The invention also provides a continuous process for cost-effective mass production of the conductive composite-based flow field or bipolar plate.

摘要翻译： 本发明提供了一种在板的表面上具有流动通道的燃料电池流场板或双极板，包括导电聚合物复合材料。 复合材料由（A）至少50重量％的导电填料构成，包括至少5重量％的增强纤维，膨胀石墨片，石墨纳米纤维和/或碳纳米管; （B）1〜49.9重量％的聚合物基质材料; 和（C）0.1至10重量％的聚合物粘合剂; 其中导电填料重量％，聚合物基质重量％和聚合物粘合剂重量％的总和等于100％，并且流场或双极板的体电导率至少为100S / cm。 本发明还提供了一种用于成本有效地批量生产基于导电复合材料的流场或双极板的连续方法。

公开(公告)号：US08753539B2

公开(公告)日：2014-06-17

申请号：US11881390

申请日：2007-07-27

申请人： Aruna Zhamu ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Bor Z. Jang

IPC分类号： C01B31/04

CPC分类号： B82Y30/00 ,  B82Y40/00 ,  C01B32/15 ,  C01B32/19 ,  C01B32/22 ,  C01B32/225 ,  C01B2204/04

摘要： A carboxylic-intercalated graphite compound composition for the production of exfoliated graphite, flexible graphite, or nano-scaled graphene platelets. The composition comprises a layered graphite with interlayer spaces or interstices and a carboxylic acid residing in at least one of the interstices, wherein the composition is prepared by a chemical oxidation reaction which uses a combination of a carboxylic acid and hydrogen peroxide as an intercalate source. Alternatively, the composition may be prepared by an electrochemical reaction, which uses a carboxylic acid as both an electrolyte and an intercalate source. Exfoliation of the invented composition does not release undesirable chemical contaminants into air or drainage.

摘要翻译： 用于生产剥离石墨，柔性石墨或纳米级石墨烯血小板的羧基插层石墨化合物组合物。 所述组合物包含具有层间空间或空隙的层状石墨和位于至少一个间隙中的羧酸，其中所述组合物通过化学氧化反应制备，所述化学氧化反应使用羧酸和过氧化氢的组合作为插层源。 或者，组合物可以通过电化学反应制备，其使用羧酸作为电解质和插层源。 本发明组合物的剥落不会将不期望的化学污染物排放到空气或排水中。

公开(公告)号：US20140127488A1

公开(公告)日：2014-05-08

申请号：US13694161

申请日：2012-11-02

申请人： Aruna Zhamu ,  Mingchao Wang ,  Wei Xiong ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Mingchao Wang ,  Wei Xiong ,  Bor Z. Jang

IPC分类号： H01B1/04

CPC分类号： H01B1/04 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/192 ,  C01B32/198 ,  C01B32/20 ,  C01B32/23 ,  C01P2006/10 ,  C01P2006/40 ,  C01P2006/90 ,  Y10S977/734 ,  Y10S977/742 ,  Y10S977/89 ,  Y10T428/24975 ,  Y10T428/30

摘要： A graphene oxide-coated graphitic foil, composed of a graphitic substrate or core layer having two opposed primary surfaces and at least a graphene oxide coating layer deposited on at least one of the two primary surfaces, wherein the graphitic substrate layer has a thickness preferably from 0.34 nm to 1 mm, and the graphene oxide coating layer has a thickness preferably from 0.5 nm to 1 mm and an oxygen content of 0.01%-40% by weight based on the total graphene oxide weight. The graphitic substrate layer may be preferably selected from flexible graphite foil, graphene film, graphene paper, graphite particle paper, carbon-carbon composite film, carbon nano-fiber paper, or carbon nano-tube paper. This graphene oxide-coated laminate exhibits a combination of exceptional thermal conductivity, electrical conductivity, mechanical strength, surface smoothness, surface hardness, and scratch resistance unmatched by any thin-film material of comparable thickness range.

摘要翻译： 一种石墨烯氧化物涂覆石墨箔，由石墨基底或具有两个相对的主表面的核心层和至少沉积在两个主表面中的至少一个上的氧化石墨烯涂层组成，其中石墨基底层的厚度优选为 0.34nm至1mm，并且氧化石墨烯氧化物涂层的厚度优选为0.5nm至1mm，氧含量为基于氧化石墨烯总重量的0.01％-40重量％。 石墨基材层可优选选自柔性石墨箔，石墨烯膜，石墨烯纸，石墨颗粒纸，碳 - 碳复合膜，碳纳米纤维纸或碳纳米管纸。 该氧化石墨烯氧化物涂层的层压材料显示了由具有相当厚度范围的任何薄膜材料而具有优异的导热性，导电性，机械强度，表面光滑度，表面硬度和耐划伤性的组合。

公开(公告)号：US08580432B2

公开(公告)日：2013-11-12

申请号：US12315555

申请日：2008-12-04

申请人： Aruna Zhamu ,  Bor Z. Jang ,  Jinjun Shi

发明人： Aruna Zhamu ,  Bor Z. Jang ,  Jinjun Shi

IPC分类号： H01M4/02

CPC分类号： H01M4/587 ,  H01M4/133 ,  H01M10/0525

摘要： A solid nanocomposite particle composition for lithium metal or lithium ion battery electrode applications. The composition comprises: (A) an electrode active material in a form of fine particles, rods, wires, fibers, or tubes with a dimension smaller than 1 μm; (B) nano graphene platelets (NGPs); and (C) a protective matrix material reinforced by the NGPs; wherein the graphene platelets and the electrode active material are dispersed in the matrix material and the NGPs occupy a weight fraction wg of 1% to 90% of the total nanocomposite weight, the electrode active material occupies a weight fraction wa of 1% to 90% of the total nanocomposite weight, and the matrix material occupies a weight fraction wm of at least 2% of the total nanocomposite weight with wg+wa+wm=1. For a lithium ion battery anode application, the matrix material is preferably amorphous carbon, polymeric carbon, or meso-phase carbon. Such a solid nanocomposite composition provides a high anode capacity and good cycling stability. For a cathode application, the resulting lithium metal or lithium ion battery exhibits an exceptionally high cycle life.

摘要翻译： 一种用于锂金属或锂离子电池电极应用的固体纳米复合颗粒组合物。 组合物包括：（A）尺寸小于1μm的细颗粒，棒，线，纤维或管的形式的电极活性材料; （B）纳米石墨烯血小板（NGPs）; 和（C）由NGP加强的保护性基质材料; 其中石墨烯片晶和电极活性材料分散在基体材料中，NGP占总纳米复合材料重量的1％至90％的重量分数wg，电极活性材料占重量分数wa为1％至90％ 的总纳米复合材料重量，并且基质材料占ww + wa + wm = 1的总纳米复合材料重量的至少2％的重量分数wm。 对于锂离子电池阳极应用，基体材料优选为无定形碳，聚合碳或中间相碳。 这种固体纳米复合材料组合物提供高的阳极容量和良好的循环稳定性。 对于阴极应用，所得到的锂金属或锂离子电池具有非常高的循环寿命。

公开(公告)号：US08497225B2

公开(公告)日：2013-07-30

申请号：US11895588

申请日：2007-08-27

申请人： Aruna Zhamu ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Bor Z. Jang

IPC分类号： H01M4/88 ,  B01J31/00 ,  B01J3/06 ,  B01J3/08 ,  C01B31/04 ,  H01G4/06

CPC分类号： H01G11/24 ,  H01G11/32 ,  H01G11/34 ,  H01G11/36 ,  Y02E60/13 ,  Y02T10/7022 ,  Y10T29/43 ,  Y10T29/49115

摘要： A method of producing a composite electrode having a specific surface area of at least 100 m2/gm for use in an electrochemical capacitor. The method comprises (a) providing exfoliated graphite flakes that are substantially interconnected to form a porous, conductive graphite network comprising pores; and (b) incorporating an electrochemically active material into at least a pore of the graphite network to form the composite electrode. The exfoliated graphite flakes are preferably obtained from the intercalation and exfoliation of a laminar graphite material selected from natural graphite, spheroidal graphite, synthetic graphite, highly oriented pyrolytic graphite, meso-carbon micro-bead, carbon/graphite fiber, carbon/graphite whisker, carbon/graphite nano-fiber, carbon nano-tube, or a combination thereof. A supercapacitor featuring such a composite electrode exhibits an exceptionally high capacitance value and low equivalent series resistance.

公开(公告)号：US08318385B2

公开(公告)日：2012-11-27

申请号：US11522580

申请日：2006-09-19

申请人： Bor Z. Jang ,  Aruna Zhamu ,  Jiusheng Guo

发明人： Bor Z. Jang ,  Aruna Zhamu ,  Jiusheng Guo

IPC分类号： H01M8/10 ,  H01M4/88 ,  H01M4/90

CPC分类号： H01M4/8842 ,  H01M4/8605 ,  H01M4/8807 ,  H01M4/881 ,  H01M4/8828 ,  H01M8/0234 ,  H01M8/1023 ,  H01M8/1039

摘要： Disclosed are processes for producing a fuel cell electrode and a membrane electrode assembly. In one preferred embodiment, the process comprises (a) preparing a suspension of catalyst particles dispersed in a liquid medium containing a polymer dissolved or dispersed therein; (b) dispensing the suspension onto a primary surface of a substrate selected from an electronically conductive catalyst-backing layer (gas diffuser plate) or a solid electrolyte membrane; and (c) removing the liquid medium to form the electrode that is connected to or integral with the substrate, wherein the polymer is both ion-conductive and electron-conductive with an electronic conductivity no less than 10−4 S/cm and ionic conductivity no less than 10−5 S/cm and the polymer forms a coating in physical contact with the catalyst particles or coated on the catalyst particles.

摘要翻译： 公开了制造燃料电池电极和膜电极组件的方法。 在一个优选实施方案中，该方法包括（a）制备分散在含有溶解或分散在其中的聚合物的液体介质中的催化剂颗粒的悬浮液; （b）将悬浮液分配到选自电子导电催化剂 - 背衬层（气体扩散板）或固体电解质膜的基板的主表面上; 和（c）去除液体介质以形成与基底连接或整合的电极，其中聚合物既具有离子传导性又具有电子传导性，电导率不小于10 -4 S / cm，离子电导率 不小于10-5S / cm，并且聚合物形成与催化剂颗粒物理接触或涂覆在催化剂颗粒上的涂层。