公开(公告)号：US20140308449A1

公开(公告)日：2014-10-16

申请号：US13986208

申请日：2013-04-15

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： C01B31/04 ,  C01B32/20 ,  D01D1/02 ,  D01D5/04 ,  D01D10/02 ,  D01F9/12

摘要： A process for producing a continuous graphitic fiber, comprising: (a) preparing a graphene oxide gel having living graphene oxide molecules or functionalized graphene chains dissolved in a fluid medium; (b) depositing at least a continuous filament of graphene oxide gel onto a supporting substrate under a condition of stress-induced molecular alignment of living graphene oxide molecules along a filament axis direction; (c) removing the fluid medium to form a continuous graphene oxide fiber, having an inter-plane spacing d002 of 0.4 nm to 1.2 nm and an oxygen content no less than 5% by weight; and (d) heat treating the continuous graphene oxide fiber to form the continuous graphitic fiber at a temperature higher than 100° C. (preferably >600° C.) to an extent that an inter-plane spacing d002 is decreased to a value of 0.3354-0.4 nm and the oxygen content is decreased to less than 5% by weight.

摘要翻译： 一种生产连续石墨纤维的方法，包括：（a）制备具有溶解在流体介质中的活性氧化石墨烯分子或官能化石墨烯链的石墨烯氧化物凝胶; （b）在活性石墨烯氧化物分子沿着长丝轴线方向的应力诱导分子取向的条件下，将至少一层氧化石墨烯凝胶的连续长丝沉积到支撑基底上; （c）除去流体介质以形成连续的石墨烯氧化纤维，其平面间距d002为0.4nm至1.2nm，氧含量不低于5wt％; 和（d）在高于100℃（优选> 600℃）的温度下对连续的石墨烯氧化纤维进行热处理以形成连续的石墨纤维，使得平面间距d002降低到 0.3354-0.4nm，氧含量降低到小于5重量％。

公开(公告)号：US08765302B2

公开(公告)日：2014-07-01

申请号：US13134782

申请日：2011-06-17

申请人： Guorong Chen ,  Aruna Zhamu ,  Bor Z. Jang ,  Zhenning Yu

发明人： Guorong Chen ,  Aruna Zhamu ,  Bor Z. Jang ,  Zhenning Yu

IPC分类号： H01M4/13 ,  H01M10/052 ,  H01M4/587 ,  C01G31/02 ,  H01M4/485 ,  H01M4/58 ,  H01M4/36 ,  B82Y30/00 ,  H01M4/76 ,  H01M4/62 ,  H01M4/48 ,  C01G31/00 ,  H01M4/02

CPC分类号： H01M10/052 ,  B82Y30/00 ,  C01G31/00 ,  C01G31/02 ,  C01P2004/03 ,  C01P2004/17 ,  C01P2004/24 ,  C01P2004/61 ,  C01P2004/64 ,  C01P2006/40 ,  H01M4/362 ,  H01M4/483 ,  H01M4/485 ,  H01M4/5825 ,  H01M4/587 ,  H01M4/625 ,  H01M4/76 ,  H01M2004/028 ,  Y02E60/122

摘要： A nano graphene-enabled vanadium oxide composite composition for use as a lithium battery cathode active material, wherein the composite composition is formed of one or a plurality of graphene, graphene oxide, or graphene fluoride sheets or platelets and a plurality of nano-particles, nano-rods, nano-wires, nano-sheets, and/or nano-belts of a vanadium oxide with a size smaller than 100 nm (preferably smaller than 20 nm, further preferably smaller than 10 nm, and most preferably smaller than 5 nm), and wherein the graphene, graphene oxide, or graphene fluoride (having a thickness

摘要翻译： 一种用作锂电池正极活性材料的纳米石墨烯氧化钒复合材料组合物，其中该复合组合物由一个或多个石墨烯，氧化石墨烯或氟化石墨烯薄片或片状微粒和多个纳米颗粒形成， 尺寸小于100nm（优选小于20nm，进一步优选小于10nm，最优选小于5nm）的氧化钒的纳米棒，纳米线，纳米片和/或纳米带 ），并且其中所述石墨烯，氧化石墨烯或氟化石墨烯（厚度<20nm，优选<10nm，进一步优选<5nm，最优选单层或小于5层）的量为 基于石墨烯，氧化石墨烯或氟化石墨烯和氧化钒的总重量，为0.01重量％至50重量％（优选<10重量％）。 这种电极材料表现出前所未有的优异的比容量，容量保持率和速率能力特性的组合。

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：US20140072871A1

公开(公告)日：2014-03-13

申请号：US13573275

申请日：2012-09-07

申请人： Guorong Chen ,  Zhenning Yu ,  Aruna Zhamu ,  Bor Z. Jang

发明人： Guorong Chen ,  Zhenning Yu ,  Aruna Zhamu ,  Bor Z. Jang

IPC分类号： H01M4/60 ,  B82Y30/00

CPC分类号： H01M4/36 ,  B82Y30/00 ,  H01M4/405 ,  H01M4/602 ,  H01M4/663 ,  H01M10/052 ,  H01M2004/021 ,  Y02E60/122 ,  Y02T10/7011

摘要： A rechargeable lithium cell comprising: (a) an anode comprising an anode active material; (b) a cathode comprising a hybrid cathode active material composed of an electrically conductive substrate and a phthalocyanine compound chemically bonded to or immobilized by the conductive substrate, wherein the phthalocyanine compound is in an amount of from 1% to 99% by weight based on the total weight of the conductive substrate and the phthalocyanine compound combined; and (c) electrolyte or a combination of electrolyte and a porous separator, wherein the separator is disposed between the anode and the cathode and the electrolyte is in ionic contact with the anode and the cathode. This secondary cell exhibits a long cycle life, the best cathode specific capacity, and best cell-level specific energy of all rechargeable lithium-ion cells ever reported.

摘要翻译： 一种可再充电锂电池，包括：（a）包含阳极活性材料的阳极; （b）阴极，其包含由导电性基材和由所述导电性基材化学结合或固定的酞菁化合物构成的混合阴极活性物质，其中，所述酞菁化合物的量为1〜99重量％，基于 导电基体和酞菁化合物的总重量合并; 和（c）电解质或电解质和多孔分离器的组合，其中分离器设置在阳极和阴极之间，并且电解质与阳极和阴极离子接触。 该二次电池显示出所有可再充电锂离子电池的循环寿命长，最佳阴极比容量和最佳电池级比能。

公开(公告)号：US20140030590A1

公开(公告)日：2014-01-30

申请号：US13507739

申请日：2012-07-25

申请人： Mingchao Wang ,  Guorong Chen ,  Aruna Zhamu ,  Bor Z. Jang

发明人： Mingchao Wang ,  Guorong Chen ,  Aruna Zhamu ,  Bor Z. Jang

IPC分类号： H01M4/583 ,  H01M4/64 ,  H01M4/66 ,  H01B1/02 ,  H01B1/12 ,  H01G9/00 ,  H01M4/62 ,  H01B1/04 ,  B82Y30/00

CPC分类号： H01B1/04 ,  B82Y30/00 ,  B82Y40/00 ,  H01G11/32 ,  H01G11/36 ,  H01M4/0402 ,  H01M4/366 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/054 ,  Y02E60/13

摘要： Disclosed is an electrode for an electrochemical energy storage device, the electrode comprising a self-supporting layer of a mixture of graphene sheets and spacer particles and/or binder particles, wherein the electrode is prepared without using water, solvent, or liquid chemical. The graphene electrode prepared by the solvent-free process exhibits many desirable features and advantages as compared to the corresponding electrode prepared by a known wet process. These advantages include a higher electrode specific surface area, higher energy storage capacity, improved or higher packing density or tap density, lower amount of binder required, lower internal electrode resistance, more consistent and uniform dispersion of graphene sheets and binder, reduction or elimination of undesirable effect of electrolyte oxidation or decomposition due to the presence of water, solvent, or chemical, etc.

摘要翻译： 公开了一种用于电化学能量存储装置的电极，所述电极包括石墨烯片和间隔颗粒和/或粘合剂颗粒的混合物的自支撑层，其中所述电极在不使用水，溶剂或液体化学品的情况下制备。 与通过已知的湿法制备的相应电极相比，通过无溶剂方法制备的石墨烯电极表现出许多期望的特征和优点。 这些优点包括较高的电极比表面积，较高的能量储存能力，提高或更高的填充密度或振实密度，较少量的粘合剂所需，较低的内部电极电阻，更一致和均匀的石墨烯片和粘合剂分散，减少或消除 由于存在水，溶剂或化学品等导致的电解质氧化或分解的不良影响

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。

公开(公告)号：US08226801B2

公开(公告)日：2012-07-24

申请号：US12460863

申请日：2009-07-27

申请人： Aruna Zhamu ,  Bor Z. Jang

发明人： Aruna Zhamu ,  Bor Z. Jang

IPC分类号： B01J19/10 ,  C01B31/00

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

摘要： The present invention provides a method of producing pristine or non-oxidized nano graphene platelets (NGPs) that are highly conductive. The method comprises: (a) providing a pristine graphitic material comprising at least a graphite crystallite having at least a graphene plane and an edge surface; (b) dispersing multiple particles of the pristine graphitic material in a liquid medium containing therein no surfactant to produce a suspension, wherein the multiple particles in the liquid have a concentration greater than 0.1 mg/mL and the liquid medium is characterized by having a surface tension that enables wetting of the liquid on a graphene plane exhibiting a contact angle less than 90 degrees; and (c) exposing the suspension to direct ultrasonication at a sufficient energy or intensity level for a sufficient length of time to produce the NGPs. Pristine NGPs can be used as a conductive additive in transparent electrodes for solar cells or flat panel displays (e.g., to replace expensive indium-tin oxide), battery and supercapacitor electrodes, and nanocomposites for electromagnetic wave interference (EMI) shielding, static charge dissipation, and fuel cell bipolar plate applications.

摘要翻译： 本发明提供了一种生产高导电性的原始或未氧化的纳米石墨烯血小板（NGP）的方法。 该方法包括：（a）提供至少包含至少石墨烯平面和边缘表面的石墨微晶的原始石墨材料; （b）将原始石墨材料的多个颗粒分散在不含表面活性剂的液体介质中以产生悬浮液，其中液体中的多个颗粒的浓度大于0.1mg / mL，液体介质的特征在于具有表面 能够使表面接触角小于90度的石墨烯平面上的液体润湿的张力; 和（c）使悬浮液暴露于足够的能量或强度水平下进行超声波处理足够长的时间以产生NGP。 原始NGP可用作太阳能电池或平板显示器（例如，替代昂贵的氧化铟锡），电池和超级电容器电极的透明电极中的导电添加剂，以及用于电磁波干扰（EMI）屏蔽，静电电荷耗散的纳米复合材料 ，和燃料电池双极板应用。